DIYHD Soft Close Barn Door Hardware Brushed Nickel Rolling Interior Sliding Indoor Track. Hardware Only, Not Including Door Panel. Soft close mechanism were pre-fixed on the track and will be hidden behind the track after installed. Slightly adjust mechanism’s location on the track when install the system. (Make T trigger fully tough the soft close teeth). Soft close kit suitable for wood door weighing up to 170lbs. Do NOT use long track for small door panel. (es, do not use 8ft hardware for 30in door panel, T triggers can not the catch soft close mechanism). Weight Capacity per Door. Pre-fixed on the track. 1 3/8″1 3/4″. Groove Width(Bottom of Door). Groove Height(Bottom of Door). 5ft/5.5ft/6ft/6.6ft are 1 piece track. 8ft is 2pcs 4ft tracks plus 1 track connector. Soft close mechanisms were pre-fixed between first and second holes on each side of the track. The height from top of the door to the top of the roller is 130mm(5 1/8″), please at least 150mm(6″) for installation. Door panel need to be cut a groove for floor guide, Groove Height:1″Width:3/10″. 8FT is 2pcs 4ft tracks with a track connector. The connector is shorter than track, roller can sliding across the connector.