<br>Item Type: Window Opener <br>Material: Aluminium <br>Opening Force: 25kg / 55lb <br>Operation Area: Start at 17-25℃ (63-78℉) <br>Maximum Open: Full at 30-32℃ (86-90℉) <br>Closing Force: 15kg / 33lb via heavy duty spring <br>Support Bar Length: Approx. 34cm / 13.4in <br>Spring Fixing Tool Size: Approx. 14 x 5 cm / 5.5 x 2 in <br>Weight: Approx. 343g / 12.1oz<br>1、Made of high quality aluminium material, not easy to rust and durable in use. <br>2、Spring and support bar provide additional protection against wind damage. <br>3、The window opener automatically opens and closes as the temperature changes. <br>4、Universal, easy to install and use, suitable for any blind window, easy to use. <br>5、Easy fitting by clamps or screws provided, no batteries or electricity required.<div>1 x Support Bar</div><div>1 x Spring Fixing Tool</div><div>4 x Slotted Screw</div><div>2 x Small&nbsp;Cross Nail</div><div>4 x TD Screws</div><div>2 x Small Screw</div><div>4 x Large Round Fixed Ring</div><div>2 x Small Round Fixed Ring</div><div>2 x Round Iron Ring</div><div>1 x Instruction Manual</div>