... 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 ... . 4.finish: silver,white,black,brown,brown,gold 5. suitable for timber or metal door.6 ... business relation in the future. Concealed door closer,passed EN1154 test 500,000 cycles,suitable for ...