【Includes Shipping】Non-woven fabric filter for mycelial bottles, Tyvek Seal Non-woven fabric filter for mycelial bottles This is a set of 100 filters with a diameter of 40mm. Can be attached to poly bottles or glass bottles. It has good breathability, does not tear even when wet, prevents the entry of harmful bacteria and insects, and has good moisture retention, allowing it to be washed and reused. This product is used by many mushroom bed manufacturers. You can buy it immediately. We cannot accept price negotiations for this product. Please note that we will not respond to comments regarding price reductions. The 500-yen coin is 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 have 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 will 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