Door damper unit for interior, swinging doors. Grips door at final 15? and softly, self-closes doors more gently compared to other door closers, putting less stress on the hinges. Surface mounting allows hardware to be added to existing doors. Recommended Door Specifications: Width: Max. 914 mm (3' 0") Weight: 15~40 kg (33~88 lbs) . Can be adjusted for door weight after installation. Damper function can also be switched off. Slim, unobtrusive design: damper unit is just ?" high, easily fitting most door frames. Available in 4 colors to match your door, specify White (WT), Light Grey (LGR), Light Brown (LBR), or Dark Brown (DBR). Can be used with HES hinges (P.180~189), sold separately. Includes screws for installation.