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 Synthetic Filter Paper Stickers 20 mm 0.3 μm Filter Disc Mushroom Applied Under Wide Mouth Jar Lid for Mushroom Cultivation (256)

Zonon Synthetic Filter Paper Stickers 20 mm 0.3 μm Filter Disc Mushroom Applied Under Wide Mouth Jar Lid for Mushroom Cultivation (256)

Product ID: 325480156

🔥0.3 μm ultra-fine filtration

🌬️Breathable air circulation

🛡️Heat & pressure resistant

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฿2543

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Sold byAmazon ThailandDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🍄 Cultivate with Confidence — The Ultimate Filter for Next-Level Mushroom Growth!

EFFORTLESS APPLICATION - Self-adhesive discs fit perfectly on wide-mouth jar lids for quick, secure installation.
PRECISION FILTRATION POWER - Filters particles as small as 0.3 microns for pristine mushroom cultivation.
SEAMLESS AIRFLOW MANAGEMENT - Breathable synthetic paper ensures optimal gas exchange, fostering robust mushroom growth.
BUILT TO WITHSTAND AUTOCLAVES - Engineered with heat and pressure resistance to survive sterilization cycles effortlessly.
BULK SUPPLY FOR CONTINUOUS CULTIVATION - Available in ample quantities (256 pcs) to keep your mushroom projects thriving without interruption.

Zonon Synthetic Filter Paper Stickers are 20 mm diameter discs with ultra-fine 0.3 μm filtration, designed for mushroom cultivation. Their heat and pressure-resistant synthetic material withstands autoclave sterilization, while the breathable design ensures optimal air circulation inside wide-mouth jar lids. Sold in bulk packs of 256, these filters provide a reliable, easy-to-apply solution for professional and hobbyist cultivators aiming for strong, healthy mushroom yields.

Specifications

ASIN	B08T1T8Z78
Best Sellers Rank	#283,634 in Kitchen ( See Top 100 in Kitchen ) #429 in Canning Lids
Brand	Zonon
Customer Reviews	4.8 4.8 out of 5 stars (268)
Date First Available	21 February 2021
Item Weight	31.8 g
Material	Paper
Model Number	Zonon-37585
Package Dimensions	17.09 x 9.19 x 0.71 cm; 31.75 g

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