... : 20-90 1, Item name: Concealed Door closer2, Item number: VW-DC-K693, Type: concealed door closer4, Material: Aluminium5, Body shape: rectangle ... speed adjustment degree: 15°C - 0°C15, Available door : wooden door, aluminum door, stainless steel door16, Item pictures in details:17,Item ... carve, excuse rasp of the die-casting.. With the stop function ( 90°pitch ) and (180°without pitch ) concealed ...