Length: 118 mm Diameter: 26 mm features: Door Damper unit for use with butt hinges Often used with rising butts Dampens the closing action between 26 deg. and 0 deg. on a 44mm door Maximum door weight 60 kg Adjustable power, slacken locking nut with 1.5mm Alan key, turn knob Mild steel on base of unit, towards 0 for less resistance, towards 9 more resistance Unit is mounted in the hinge edge of the door (frame or door mounted) Should be positioned in close proximity to one of the rising butts c/w No4 x 5/8screws If door mounting, ensure that the units bore hole is parallel to the door face.Placing the unit further from the hinge pivot point gives maximum mechanical advantage The units faceplate and strike plate must be flush mounted