Package includes: you can get 2 shed vents with screens and screws,to complete the installation, making the installation very easy, the number is enough, you can also give it as a gift to your friends. : these gable vent are made of aluminum alloy materials, smooth and , and can be installed in attics, houses, sheds are places for air circulation, while providing a stylish look that can be matched with any siding Square Size: the size of the vent in the shed is 8x12inch/20x30cm. The perfect square vent effectively promotes air circulation and freshens the air in the room, while the design of the plastic filter at the back also prevents insects from entering Air Circulation Systems: these attic vents allow air to enter your home while keeping other living things and garbage out; The components used are noise-free, reducing unnecessary sound and vibration of the door vents. Note: Back net, not removable. Widely Uses: our louvered vent is ideal for air circulation, they offer good ventilation and protection and can be used as an intake or exhaust outlet in a lot of environments, in a lot of locations including garages, sheds, basements, bathrooms and more. Size:30x20cm Color:Black Material:Aluminum Alloy Package Contents: 2 * Attic Vent 1 set * screw Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.