600 series door closer

600 series door closeris economical models,but also has great performance for commercial and residential use. 1.two separate valves with adjustable closing and latching speed. 2.suit for both right and left hand door 3.500,000 cycles guaranteed 4.built-in hold open function for 601,602 and 603 5.heavy duty rack and pinion,high strengh aluminium body 6.standard packing for regular and top jamb installation.parallel arm optional 7.decorative P.V.C. cover or steel cover for 603 and 632 only. 8.finish color upon request