Profile: Zuko Engineers specializes in providing door closing solutions. We offer door hardware products such as heavy duty door closers and helical door springs. Our hydraulic door closers are available in different types such as cast iron door closers, aluminum door closers, heavy duty floor door closers and floor spring door closers. They are widely used in places where air conditioners are continuously switched on. Our metal door closer are available in standard sizes. The maximum width of door is 900-1200mm, suitable for door weight of 60-65 kg. Double speed door closer includes a single hydraulic pressure valve to adjust second speed for latching.