Do you apply these under, over or both?

I think applying both is overkill and create “too much” a filter situation. One os plenty and usually on the outside. But i do not know your intended use. But again one is plenty and on the outside

Will they cover 2 in hole?

Our stickers are only 2cm and can't cover 2 inches.

what is the material?

No idea. But its breathable. Seems like a poly.

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Zonon 256 Pieces Synthetic Filter Paper Sticker 20 x 3 mm Filter Disc | Mushroom Stickers Bulk, High Airflow , Mushroom Growing Supplies, Applied Under Mason Jar Canning Jar Lids

Product ID: 289763166

🔥Heat resistant up to autoclave standards

🌬️0.3 μm filtration for optimal airflow

🛡️Pressure resistant for reliable durability

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Description

🍄 Elevate your mushroom game with filters that breathe and endure!

BREATHABLE AIRFLOW - Ensures perfect air exchange to promote robust mushroom growth
PRECISION FILTRATION - Filters particles as small as 0.3 microns to keep your cultivation pure
BULK SUPPLY ADVANTAGE - 256-piece pack means you’re always stocked and ready to cultivate
EFFORTLESS APPLICATION - Self-adhesive design sticks securely to wide-mouth jar lids in seconds
AUTOCLAVE READY DURABILITY - Withstands high heat and pressure for sterilization without compromise

The Zonon 256 Pieces Synthetic Filter Paper Stickers are 20mm diameter discs designed for mushroom cultivation. Featuring outstanding heat and pressure resistance, they are autoclave-safe and filter particles down to 0.3 microns. Their breathable, self-adhesive design fits wide-mouth canning jar lids, ensuring optimal air circulation for healthy mushroom growth. Supplied in a bulk pack of 256, these filters offer reliable, long-lasting performance for serious cultivators.

Specifications

ASIN	B08T1T8Z78
Best Sellers Rank	#30,697 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #429 in Greenhouses & Plant Germination Equipment
Date First Available	January 14, 2021
Item Weight	1.12 ounces
Item model number	Zonon-37585
Manufacturer	Zonon
Package Dimensions	6.73 x 3.62 x 0.28 inches

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$30.80

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

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TrustScore 4.5 | 7,300+ reviews

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