perfect for your greenhouse --opens and closes your greenhouse .as the temperature changes automatically, maintains the growing temperature.and prevents your greenhouse from overheating.Non Electric, uses solar energy, open or the greenhouse as temperature rises or dropsIncluding fittings & installation manualCan be clamped onto or screwed onto your greenhouseframeImportant notice:Do not use this opener anywhere the temperature will 50 (122F)Please your greenhouse can be opened freely by at least 45cm (18inch)Do excessive loads by or covering windowDo not dismantle the cylinderThe opener CANNOT stop by manual.Greenhouse Opener KitColor: silver + blackMaterial: Aluminum AlloyFully adjustable between 20 - 25 C (68 - 77 F)Maximum opening: 45cm / 18 inchSize: 38 x 9.5 x 9.5 cm / 14.96 x 3.74 x 3.74 inchPackage: 1* Automatic Opener KitOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm. Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-15 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don''t hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it