About this item What You Get: 2 Pieces grow tent vent cover filter. Diameter 6 inch/15.2cm, Length 3.1 inch/7.8cm. Two-pack set makes clean and replace more conveniently and can be folded to save more storage space. Adjustable & Widened: Tents vent cover is designed with elastic band and fixed buckle, widened edge for fitting different grow tents better and firmly covering to avoid repeating install problem. Plants Growth Partner: Duct filter net can effectively prevent other creatures entering tent inside to disturb plants growth, also breathable to remain good ventilation. Durable Quality: Made of high-density oxford cloth and nylon drawstring, waterproof and wear-resistant, easy to clean with water and soap, so you don’t need to worry about smearing or breaking it. Quick Use: Mesh screen for exhaust fan can be directly attached to 4 inches round duct openings, vents, exhaust fans, etc. Or just tighten long thin string and lock it to fit smaller open mouth.