... .Surface door closer,passed EN1154 test 500,000 cycles,suitable for timber or metal door 2.Using condition:-45~80degree. Surface ... door closer,passed EN1154 test 500,000 cycles,suitable for timber or metal door Description1.Concealed door closer,passed EN1154 ... relation in the future. Surface door closer,slide arm optional,passed EN1154 test 500,000 cycles,suitable for timber or metal door