Mycology Lid Filters & Ports - 24 Combo Pack

Replacement parts for the DIY mycology lid system

If you're running mason jar grain spawn (Colorado Cultures Reusable Mycology Lids — the canonical companion product), you'll eventually need replacement components. Filters foul. Injection ports degrade after dozens of needle punctures. Both are consumable parts of an otherwise-durable lid system.

The Mycology Lid Filters & Ports 24 Combo Pack is the replenishment kit. A 24-piece combo containing 12 injection ports + 12 PTFE 13mm syringe filters — enough to refresh 12 complete mycology lids at the components most likely to need replacement.

Or, if you're building your own mycology lids from scratch (drilling holes in standard canning lids), this pack provides the two most critical components — the self-healing injection port and the breathable PTFE filter — in a single purchase.

What's in the pack

• 12× Injection ports — self-healing rubber septums (typically silicone or butyl rubber), sized to fit a standard 1/4" or 5/16" drilled hole in a mycology lid
• 12× PTFE 13mm syringe filters — hydrophobic, gas-exchange-permeable, contamination-blocking

That's enough to refresh 12 lids in a single pack. For most home cultivators running 4-6 lids, this is a 2+ year supply.

Why these components specifically

The Mycology Lid system has 5 main components:

1. Outer metal ring — durable, lasts indefinitely
2. Inner lid (plastic or metal) — durable, lasts indefinitely
3. Silicon O-ring — wears over time, but slowly; replaces less frequently
4. Injection port (self-healing rubber) — wears with each puncture; the most frequently-replaced component
5. Breathable filter (PTFE) — fouls and degrades over time, especially after multiple sterilization cycles

The combo pack covers components 4 and 5 — the two most-frequently-replaced parts. Components 1, 2, and 3 typically last for years of regular use.

Injection port spec

What it is

A small (typically 13mm or 1/2" diameter) rubber disc that fits snugly into a drilled hole in a mycology lid. It's the self-healing access point for inoculation:

• Pre-inoculation: Port is intact, sealed
• During inoculation: A needle pierces through the port to deliver inoculant
• Post-inoculation: The port self-heals, maintaining sterile integrity
• Multiple cycles: Each port supports 50+ punctures before requiring replacement

Material

[VERIFY exact rubber compound — typical mycology ports are:]

• Butyl rubber — best for chemical resistance and longevity
• Silicone rubber — softer, easier to puncture, more flexible
• Either works for typical home cultivation; commercial users may have specific preferences

Heat tolerance

• Autoclave-rated to 250°F+ (passes pressure cooker sterilization without damage)
• Long-term stability through repeated heating cycles

Lifespan

Typical lifespan of a single injection port:

• 50+ needle punctures before seal integrity degrades
• 20-30 sterilization cycles in a pressure cooker
• Replace when:
• The port shows visible cracks
• Liquid leaks during inoculation
• The port doesn't fully self-seal after needle withdrawal
• The port becomes hardened or brittle

PTFE 13mm syringe filter spec

What it is

A small cylindrical filter, typically 13mm in diameter, made of PTFE (polytetrafluoroethylene) — a hydrophobic plastic that allows gas to pass through while blocking liquid and particulates.

Why PTFE

PTFE is the industry standard for mushroom cultivation filters because:

• Hydrophobic — water vapor passes through; liquid water doesn't (so dripping doesn't compromise the filter)
• Chemical inert — doesn't react with substrate gases, microbial byproducts, or sterilization chemicals
• High heat tolerance — survives pressure cooker temperatures (250°F+)
• Long service life — properly maintained, lasts for many sterilization cycles
• Bacterial barrier — 0.2-0.5 micron pore size blocks bacteria and most fungal spores
• CO₂/O₂ permeable — sufficient gas exchange for mushroom mycelium respiration

Pore size

[VERIFY exact pore size of these filters — typical mycology filters are:]

• 0.22 µm — surgical-grade, blocks all bacteria
• 0.45 µm — most common for mycology; blocks bacteria and most spores
• 0.5 µm — slightly faster gas exchange, still adequate for most species

A 0.22-0.45 µm filter is appropriate for cubensis and most cultivated mushroom species.

Heat tolerance

• Autoclave-rated to 250°F+
• Repeated sterilization cycles don't degrade the filter material itself, but may slowly reduce flow rate over time

Lifespan

Typical lifespan:

• 3-10 sterilization cycles depending on substrate type and contamination load
• Replace when:
• The filter is visibly discolored
• The filter shows fouling (substrate residue, dust accumulation)
• The filter is physically damaged or punctured
• Gas exchange seems insufficient (substrate slows or stalls during spawn run)
• The filter is heavily fouled from a previous contamination event

Use cases

Refurbishing existing Colorado Cultures Mycology Lids

If you already own 4-12 Mycology Lids and they've been used for several batches:

1. Disassemble each lid between batches
2. Inspect the current filter and port
3. If degraded: swap out for fresh components from this pack
4. If still good: reassemble and reuse

The 24-piece pack supports refurbishing 12 lids at the components most likely to need replacement.

Building your own mycology lids from scratch

If you want to make your own mycology lids using standard canning lids:

1. Buy standard canning lids and rings (available at any kitchen supply store)
2. Drill 2 holes in each lid — one for the injection port (1/4" diameter typical) and one for the filter (1/2" diameter typical)
3. Use a small amount of silicone caulk to seal the port and filter in place
4. Add an O-ring or silicone gasket for the jar-rim seal
5. Sterilize before first use

This DIY approach is cheaper per-lid than buying complete Mycology Lids, but more labor-intensive and may produce variable seal quality. For a small operation, DIY is fine; for serious cultivation, the pre-built Mycology Lids are typically the better choice.

Stocking spares for emergency replacement

If a filter fouls or a port fails mid-batch, you don't want to scramble. Keep a sealed pack of 24 replacements on hand so you can swap and continue without delay.

Compatibility

With Colorado Cultures Mycology Lids

• Direct drop-in replacement for the filter and port components
• No tool required for replacement — the components push-fit or snap into the lid housing
• Same materials and tolerances as the original components

With DIY mycology lids

• PTFE filters can be installed in any lid with a 13mm diameter filter housing
• Injection ports fit any drilled hole of approximately 1/4" (6.35mm) diameter; sized to expand and create a tight seal
• May require adhesive or silicone seal for permanent installation in DIY lids

With non-mycology applications

• The components are food-grade and laboratory-grade
• Compatible with general filtration uses (lab work, brewing, etc.)
• Not certified for medical or pharmaceutical applications

Storage

• Sealed packaging: [VERIFY shelf life — typically 2-5+ years from manufacture]
• Once opened: Use within 6-12 months for best results; store in a dry, dust-free container
• Avoid: Direct sunlight, temperatures above 100°F, wet conditions
• Sterility: Components are clean but not sterile. Sterilize the assembled lid in a pressure cooker before first use.

What's in the box

• 12× Injection ports (rubber septums)
• 12× PTFE 13mm syringe filters
• [VERIFY: any included installation instructions]
• Sealed packaging

What's NOT in the box

• Complete Mycology Lids (the assembled lids are sold separately as the Reusable Mycology Lids product)
• Outer metal rings (your existing rings work; if needed, source from any canning supply)
• Inner lids (your existing inner lids work)
• O-rings (the O-rings on existing lids typically last longer than filters and ports; replace separately if needed)
• Adhesive or silicone sealant for DIY installation (you'd need this only for building lids from scratch)
• Canning jars

Pricing

• Single 24-piece combo pack: [VERIFY current retail price]
• Multi-pack discounts: [VERIFY availability for high-volume cultivators]

Per-replacement cost economics

A 24-piece combo pack at [VERIFY retail price] yields:

• Per-injection-port: [VERIFY math, typically $0.50-1.50 per port]
• Per-filter: [VERIFY math, typically $0.50-2.00 per filter]
• Per-lid refurbishment: Combined cost of one port + one filter
• Per-spawn-jar over 1 year: Negligible — these components support 5-10+ spawn runs each

The per-spawn-cost of having reliable, fresh mycology lid components is less than $1 spread over the entire lid lifetime.

Who buys this

• Cultivators currently running Colorado Cultures Mycology Lids — natural replenishment cycle
• DIY mycology lid builders — sources the two components they need
• High-volume cultivators — frequent component replacement is part of routine maintenance
• Cultivators recovering from contamination scares — fresh filters reduce risk of contamination repeat
• Multi-vendor cultivators — these components work with non-Colorado Cultures lid designs too
• Beginner cultivators — having spare components on hand reduces panic during a contamination or failure event
• Wholesale and commercial cultivators — supporting larger-scale operations with bulk parts

What this is NOT

• Not complete lids. This is a replacement components kit. Buy the complete Mycology Lids separately if you need the full assembly.
• Not autoclaved/sterile. The components are clean but not pre-sterilized. Sterilize the assembled lid before first use.
• Not for surgical or medical applications. These are mushroom-cultivation-grade components, not surgical-grade.
• Not compatible with all DIY lid designs. Confirm your lid design accepts standard 13mm filters and 6mm/1/4" ports before ordering.

Pairing across the Colorado Cultures lineup

• Reusable Mycology Lids (Regular & Wide Mouth) — primary use case for replacement components
• Sterilized Syringes (10mL Luer-Lock) — primary inoculation tool through the injection port
• Sterile Disposable Scalpels #11 — for opening colonized jars
• Portable Still Air Box — sterile workspace
• Pressure cooker / autoclave — for sterilizing assembled lids before use

A note on filter sterility

The PTFE filters in this pack are clean but not pre-sterilized. The filter material is inherently low in bioburden, but for grain spawn work, you should always sterilize the assembled lid in a pressure cooker before first use (15 PSI, 60-90 min).

After sterilization, the filter remains effective for multiple cycles. Replace at the first sign of fouling, discoloration, or physical damage.