New arrivals, surprises! New arrivals every day, daily deals, don't miss out! Guaranteed brand new products, quality workmanship and exclusive offers. Buy now and we will deliver your item as soon as possible, have a great day! Important notice: 1. Automatic greenhouse vent should not be used at temperatures above 50°C (122°F) 2. Make sure your greenhouse window opens normally Specifications: Maximum window opening height approx. 45cm The temperature for full opening approx. 30°C (depending on adjustment and load) Maximum weight not more than 7kg / 15lb, opening temperature regulated 16 to 25°C Note: When you receive this item in summer, you need to put the black bar in the refrigerator for at least 5 minutes to fully retract the cylinder before assembling this product. Colour: black and silver Material: aluminum alloy Package contents: 1 x Automatic Window Opener Kit Only the above package contents, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real one. The allowable measurement error is +/- 1-3cm.