... 2,color: aluminium color 3,door width: 500mm-2300mm 4,door weight: 20-90 1, Item name: Concealed Door closer2, Item number: VW ... -DC-K693, Type: concealed door closer4, Material: ... speed adjustment degree: 15°C - 0°C15, Available door : wooden door, aluminum door, stainless steel door16, Item pictures in details:17, ...