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 128 Pieces Synthetic Filter Paper Stickers 20 mm 0.3 mm Synthetic Filter Disc Tape Mushroom Applied Under Mason Jar for Mushroom Cultivation

Product ID: 259763290

🔥Heat resistant up to autoclave temps

🌬️0.3 μm breathable filter pores

🛡️Pressure resistant for safe sterilization

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Description

🍄 Cultivate with confidence—filter your way to fungal fame!

EFFORTLESS APPLICATION - Self-adhesive design sticks securely to wide-mouth jar lids
PRECISION AIRFLOW CONTROL - 0.3 μm pores ensure optimal gas exchange without contamination
AUTOCLAVE READY DURABILITY - Withstands high heat and pressure for flawless sterilization
BULK SUPPLY FOR CONSISTENCY - 128-piece pack keeps your mushroom cultivation uninterrupted
ESSENTIAL FOR THRIVING MUSHROOMS - Promotes healthy growth by balancing internal and external air

Zonon’s 128-piece synthetic filter paper stickers are engineered for mushroom cultivators seeking reliable, autoclave-safe, breathable filters. Each 20 mm disc features 0.3 μm pores that maintain sterile airflow when applied to wide-mouth mason jar lids, ensuring optimal mushroom growth. The self-adhesive, heat- and pressure-resistant design supports repeated sterilization cycles, making it an indispensable tool for professional and hobbyist cultivators alike.

Specifications

ASIN	B08P1T1Z1S
Best Sellers Rank	#41,544 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #498 in Greenhouses & Plant Germination Equipment
Date First Available	November 23, 2020
Item Weight	0.64 ounces
Item model number	Zonon-37585
Manufacturer	Zonon
Package Dimensions	8.4 x 4.7 x 0.1 inches

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14576CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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The product quality is outstanding. Exactly what I needed for my work.

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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