... cycles,suitable for timber or metal door 2.Using condition:-45~80degree. Surface door closer,passed EN1154 test 500,000 cycles,suitable ... 500,000 cycles.2.material:aluminum alloy.3.Using condition:-45 degree to 80degree. 4.finish: silver,white,black,brown,brown ... . Wish we can set up business relation in the future. Surface door closer,slide arm optional,passed EN1154 test 500,000 ...