【Roller Track Kit】This sliding door roller track kit helps the door maintain balance, prevents swinging and ensures smooth sliding. An ideal roller for assembling your own industrial furniture. To make a workshop door, relatively heavy and two rollers are enough and roll well despite the weight. 【Sturdy and Durable】Made of zinc alloy and nylon, it is durable with stable characteristics and long service time. Diameter 70mm. Width 34mm. Inner hole 15mm (34x70x15mm) 【Easy to install】Our groove wheel is durable with stable characteristics and long service time. Easy to install and use. Move the door to save your space, decorate and beautify your home. Unisex Swimsuit . 【Function】Help us move the door to save your space, decorate and beautify your home, maintain balance, prevent swinging and ensure smooth sliding, good function and good mute effect. 【Application】U-shaped groove design, smooth surface reduces friction and increases the use time. Widely used in doors and windows to track and