Material: Aluminum alloy body + Nickel-plated steel parts; The bracket is replaced with a nickel-plated surface metal bracket, easy to install and maintain, long service life. Suitable for home, office, hotel room door. Door weight 25~45 kg, Door width ≤ 1000 mm, Door opening angle up to 150°. The height difference between the door frame and the door should be less than 5 cm, If the door frame is too high, you should use a material to raise the bracket so that it is parallel to the door frame. For best results, please ensure that the door can open and close naturally and that there is no excessive resistance.