1.Concealed door closer,passed EN1154 test 500,000 cycles,suitable for timber or metal door 2.Using condition:- ... 45~80degree. Concealed door closer,passed EN1154 test 500,000 cycles,suitable for timber or metal door Description1.Concealed door ... closer,passed EN1154 test 500,000 cycles.2.material:aluminum alloy.3.Using condition:-45 degree ...