These stick-on monotub air filters provide optimal air exchange while maintaining sterility during mushroom fruiting. Designed to fit over 2 inch holes, each filter is made from a high-airflow, contamination-resistant material backed with strong 3M adhesive for a secure, long-lasting seal. A simple and consistent solution for reliable fruiting conditions.

Highlights

• High-airflow material supports healthy fresh air exchange
• Helps maintain humidity inside the fruiting chamber
• Strong 3M adhesive for fast, secure application
• 2.5 inch diameter fits perfectly over 2 inch holes
• Cleaner, quicker alternative to poly-fil stuffing
• Ideal for beginners and experienced growers

Quantity Prices

• 1–9: $0.95 each
• 10–24: $0.75 each
• 25+: $0.65 each

Discount automatically applies at checkout