... 1.Concealed door closer,passed EN1154 test 500,000 cycles,suitable for timber or metal ... 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 ... . Concealed door closer,passed EN1154 test 500,000 cycles,suitable for timber or metal door