1、Package Include: You will receive 2 duct filter net covers with a diameter of 4 inch, 6 inch, or 8 inch, each of which is durable. The two-pack set makes it easier for you to clean and replace. 2、Elastic Band Design: Our tents vent cover doesn't use the hook and loop tape connection method, but is equipped with elastic bands and fixed buckles, which can automatically adjust the size of the opening according to the needs, and it is more firmly fixed at the vent without falling, allowing your plant tent to keep clean and of dust. 3、Durable Material: Our duct filter net covers are made of waterproof and durable cloth, so you don't have to worry about it being damaged in the humid environment of your plant tents. The net in the middle is made of high-quality plastic and has no peculiar smell. You can use it for a long time. 4、Multifunction: The meshs holes on our grow tents vent filter cover are of appropriate size, not only will not hinder the ventilation of the plant tent, but also can effectively dust-proof and ensure that insects, spiders, etc. do not enter the inside environment, and protect your plants from damage and can grow healthily. 5、Easy to Use: You only need to cover our grow tents vent filter cover on the vent pipe opening, then tighten the elastic band and the fixing buckle to fix it. When it is dirty, you can wash it by hands or machine, which is more convenient.  Specification: Material: Cloth Color: Black Size: S: 10 x 13.5 cm/4 x 5.3 inch, M: 15 x 13.5 cm/6 x 5.3 inch, L: 20 x 16.5 cm/8 x 6.5 inch Weight:  10 g,  50 g,  150 g Package Include: 2× Tents Vent Filter Cover