1.Concealed door closer,passed EN1154 test 500,000 cycles,suitable ... 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 ... business relation in the future. Concealed door closer,passed EN1154 test 500,000 cycles,suitable for timber or ...