Model Number: HSD 061/062 Brand Name: HUISDA , LANGN Key Specifications/Special Features: *For 0-180° full hydraulic control with two sections for controlling the closing speed individually, closing door section 180-20°, closing lock section 20-0°*Constant temperature fitting, can keep a steady closing speed on the change of the difference in temperature*Alloy die-cast body, safe and durable, protected by three layers bright paint, prevent oxidation*Auto-fitting, suitable for left or right hand door, have equipment which can stop at any point* Surface colors: sliver, golden, black or custom-made*Passed 4000, 000 times opening-closing test