hydraulic door closer hinge for double swing door

hydraulic door closer hinge for double swing door Specifications: 1. Shaft dimension 23mm; 2. Finishing : satin silver & gold 3.Adopt Germany branded hydraulic oil (Nair-45'C ,flash point 190'C),Germany branded latex sealing piece (heat resistance over 150'C),imported springs As national patented products, our 3-in-1 hydraulic door closer hinge integrates the functions of door closer, hinge, and door stopper/holder/sucker. It can completely take the place of the three above door hardware, with its excellent performance. It is featured with those advantages such as unique designs, compact structures, small volume, light weight, elegant appearance, and steady performance. to make the door close automatically under uniform closing speed. Applications: Used in door of any materials that can be installed with ordinary hinges & is specially designed for alu alloy door .