- 2 ventilation covers designed for tents and grow cabinets - Waterproof Oxford material with silver coating and durable flat mesh - Elastic band and fixed buckle: automatic and secure fit on the vent - Appropriately sized mesh holes: promote air circulation and prevent dust and spiders from entering - Protects plants and improves the growing environment - Easy installation: fits into the ventilation duct opening and adjusts easily - Easy maintenance: washable by hand or machine - Size: 15.24 cm diameter, compatible with most indoor grow ventilation systems