Features: 1. Made of high quality aluminium material, not easy to rust and durable in use. 2. Spring and support bar provide additional protection against wind damage. 3. The window opener automatically opens and closes as the temperature changes. 4. Universal, easy to install and use, suitable for any blind window, easy to use. 5. Easy fitting by clamps or screws provided, no batteries or electricity required. Specification: Condition: 100% Brand New Item Type: Window Opener Material: Aluminium Opening Force: 25kg / 55lb Operation Area: Start at 17-25℃ (63-78℉) Maximum Open: Full at 30-32℃ (86-90℉) Closing Force: 15kg / 33lb via heavy duty spring Support Bar Length: Approx. 34cm / 13.4in Spring Fixing Tool Size: Approx. 14 x 5 cm / 5.5 x 2 in Weight: Approx. 343g / 12.1oz Package List: 1 x Support Bar 1 x Spring Fixing Tool 4 x Slotted Screw 2 x Small Cross Nail 4 x TD Screws 2 x Small Screw 4 x Large Round Fixed Ring 2 x Small Round Fixed Ring 2 x Round Iron Ring 1 x Instruction Manual Features Durable and Rust-Resistant: Made of high-quality aluminium material, this Automatic Opening Closing Louver Blind Window Opener is built to last, ensuring long-term durability and resistance to rust. Wind Protection: Equipped with a spring and support bar, this opener provides additional protection against wind damage, keeping your blinds secure and intact even during strong gusts. Temperature-Sensitive Automation: Experience effortless window operation with the automatic opening and closing feature that adjusts according to the temperature changes, providing optimal ventilation and comfort. Universal Compatibility: This versatile window opener is designed to fit any blind window, offering easy installation and use. Enjoy the convenience of this tool with any type of blinds in your home or office. Easy Installation: No need for batteries or electricity, as this window opener can be easily fitted using the clamps or screws provided. Enjoy hassle-free installation and use without any additional power source requirements.