Greenhouse Window Opener Automatic Vent Accessory Controlled Adjustable with Rod Heavy Duty Garden Tools Garden Tool Rack<br> Greenhouse Automatic Window Opener can prevent wind gusts and be clamped on the greenhouse without drilling holes<br> About our Greenhouse Window Opener, the temperature changes automatically to maintain the optimal growth temperature and prevent the greenhouse from overheating<br> The automatic vent opener is suitable for most current garden greenhouses<br> Auto Greenhouse Window Opener is made of quality aluminum alloy. Durable and rust-proof in humid environments, with long service life<br> Greenhouse Accessory is Easy to install and can be screwed directly into polycarbonate board, wood or metal frame<br> Color: black silver<br> Size: about 33.5cm long<br> Quantity: 1pc<br> 1.As different measuring methods,it will occur 1-3 cm deviation about the items,please ensure that it is okay for you before ordering.<br> 2. Because of different monitors and lamplight, the picture may not reflect the actual color of the item, really thank you for your kind understanding.<br> 3. Only the above package contents, excluding other products.<br>