Feature:1. Set of 5pcs mounted pillow block bearings.2. Smooth moving, low friction and high rigidity.3. Zinc alloy flanged base with excellent quality and long working life.4. Very helpful in holding the driveshaft in place.5. Mounted pillow block bearings, parts and accessories for 3D printer and other machinery.Specification:Features:Set of 5pcs mounted pillow block bearings.Smooth moving, low friction and high rigidity.Zinc alloy flanged base with excellent quality and long working life.Very helpful in holding the driveshaft in place.Mounted pillow block bearings, parts and accessories for 3D printer and other machinery.Specifications:Inner Diameter: 8mm / 10mm / 12mm / 17mm / 20mm (Optional)Material: Zinc alloy8mm:Item Size: 55 * 13 * 29mm / 2.16 * 0.51 * 1.14inItem Weight: 34g / 1.20oz (per bearing)Package Weight: 172g / 6.06ozPackage Size: 25 * 11 * 7cm / 9.84 * 4.33 * 2.76in10mm:Item Size: 67 * 16 * 35mm / 2.64 * 0.63 * 1.38inItem Weight: 43g / 1.52oz (per bearing)Package Weight: 215g / 7.58ozPackage Size: 25 * 11 * 7cm / 9.84 * 4.33 * 2.76in12mm:Item Size: 71 * 16 * 38mm / 2.79 * 0.63 * 1.49inItem Weight: 50g / 1.77oz (per bearing)Package Weight: 250g / 8.81ozPackage Size: 25 * 11 * 7cm / 9.84 * 4.33 * 2.76in17mm:Item Size: 85 * 18 * 47mm / 3.34 * 0.71 * 1.85inItem Weight: 90g / 3.19oz (per bearing)Package Weight: 452g / 15.94ozPackage Size: 27 * 12 * 8cm / 10.63 * 4.72 * 3.15in20mm:Item Size: 100 * 20 * 55mm / 3.94 * 0.79 * 2.16inItem Weight: 138g / 4.88oz (per bearing)Package Weight: 701g / 24.72ozPackage Size: 29 * 15 * 10cm / 11.42 * 5.91 * 3.94inPackage List:5 * BearingPackage List:5 * Bearing