... closer,passed EN1154 test 500,000 cycles,suitable for timber or metal door 2.Using condition:-45~80degree. Concealed ... closer,passed EN1154 test 500,000 cycles,suitable for timber or metal door Description1.Concealed door closer,passed EN1154 ... 5. suitable for timber or metal door.6.item No.: 4022,4023,4302,4303,4304.Built-in Hold open is ... EN1154 test 500,000 cycles,suitable for timber or metal door