【Includes Shipping】Non-woven fabric filter for mycelial bottles - Tyvek Seal Non-woven fabric filter for mycelial bottles Set of 100 filters, φ40mm. Can be attached to poly bottles and glass bottles. Excellent breathability, does not tear when wet, prevents the entry of harmful bacteria and insects, and has good moisture retention. Can be washed and reused. This product is used by many mushroom bed manufacturers. You can buy it immediately. Negotiations for discounts on this product are not accepted. We will not respond to comments regarding discounts, so please understand. 500-yen coins are not included. If you want a quantity other than the quantity listed, please contact us. This is a safe and secure anonymous delivery service where the buyer does not need to disclose their name or address. We will ship via Yu-Yu Mercari delivery, so we cannot accept requests for specific delivery dates or times. Basically, if payment is confirmed in the morning on weekdays, we ship the same day. If you have any problems upon arrival, please contact us via message. Japanese Giant Stag Beetle Japanese Giant Stag Japanese rhinoceros beetle Rhinoceros beetle Stag beetle Stag Tyvek filter Tyvek seal Tyvek Insect jelly Pro jelly Mycelial bottle Mycelial bottle Mushroom bed KB Farm Clear bottle Glass bottle Poly bottle