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

🔥Heat resistant up to autoclave standards

🌬️Optimized breathable air circulation

🛡️0.3 μm microfiltration precision

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Sold byAmazon NicaraguaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🍄 Cultivate with Confidence — Filter, Breathe, Grow!

SEAMLESS WIDE MOUTH FIT - Perfectly sized 20 mm discs for easy application on standard jar lids
PRECISION MICROFILTRATION - Filters down to 0.3 microns, ensuring contaminant-free mushroom cultivation
AUTOCLAVE READY DURABILITY - Withstands high heat and pressure for sterilization without compromise
ENHANCED AIRFLOW FOR GROWTH - Breathable synthetic paper promotes ideal gas exchange for robust mycelium
BULK PACKS FOR DAILY CULTIVATION - Available in ample quantities to keep your mushroom projects thriving nonstop

Zonon Synthetic Filter Paper Stickers are 20 mm diameter discs designed for mushroom cultivation. Featuring 0.3 μm filtration and exceptional heat and pressure resistance, they fit wide-mouth jar lids to enable sterile air exchange. Ideal for autoclave sterilization, these breathable filters ensure optimal mycelium growth and come in bulk packs to support continuous cultivation cycles.

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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TrustScore 4.5 | 7,300+ reviews

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