... 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 test 500,000 cycles.2.material:aluminum alloy.3.Using condition ... .item No.: 5102,5203,5304,5102S,5203S,5304S.adjustable sweep speed ,adjustable latch sped,door opening freely from 0°-180°,hold ...