Features: Adopting aluminum alloy as raw material, durable and reliable. Plate comes in size T6mm50mm50mm, fit for 20mm V-Groove aluminum profile. Package comes with 1aluminum plate, 4delrin mini V wheel, 2aluminum spacers 6mm, 2eccentric spacers 6mm, 4low profile screws 25mm, 4low profile screws 10mm, 4M5 nut, 4shim, easy to install. 100% brand new and high quality. Professioanl accessories for 3D printing and CNC. Specifications: Material: aluminum alloy Wheel Color: black / white (optional) Plate Size: T6mm50mm50mm Package Size: 18 * 12 * 4cm / 7.09 * 4.72 * 1.57in Package Weight: 74g / 2.61oz Package List: 1 * aluminum plate 4 * delrin mini V wheel 2 * aluminum spacers 6mm 2 * eccentric spacers 6mm 4 * low profile screws 25mm 4 * low profile screws 10mm 4 * M5 nut 4 * shim