Royal Hardware Aluminium Hydraulic Door Closer, 180x 36 x 39.5mm (Silver) Speed: dual body size(MM): 180x 36 x 39.5 wieght of door (Kg.): 60 - 80 specifiaction : body manufactured from special aluminum extruded and machined to extreme accuracy. Rack and pinion manufactured from steel alloy duty machined and heat-treated. Single & double regulating valve independently controls and adjusts closing and latching speeds. Right-hand and left-hand opening doors door / frame mounting door opening angle 180 degrees small & compact size. Best company products