The Quad-Ball is a smooth and quiet top-hung system designed for single internal doors in top-mount and wall-mount applications. The enclosed slim line track design allows for a more secure system as the wheels cannot jump off the track. Ideal for solid-core doors and oversized doors in heavy domestic applications as well as light commercial and industrial applications. Door track set ideal for solid core or oversized doors Suitable for internal sliding doors in a wall mount application Suitable for doors up to 50kgs Includes Aluminium track and Aluminium Door Carrier