2 pieces brand new and high quality door wheels. Diameter 70mm. Width 34mm. Inner hole 15mm (34x70x15mm) 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. Move the door to save your space, decorate and beautify your home. Our groove wheel is made of zinc alloy and nylon, it is durable with stable characteristics and a long service time. Easy to install and use. Specification: Material: Zinc Alloy, Nylon Size: Approx. 7 * 3.4 * 1.5cm / 2.75'' * 1.34'' * 0.59'' Applicable: Barn Door Package Included: 2 * Barn Door Wheel