Total 8 × 750mm 2Pcs Rail Guide 4Pcs SCS8UU Ball Bearing + 4Pcs SK8 Rail Support
Specification: Rail Guide Total Size: 8mm × 750mm SK8 Rail Support Size: 33 × 42 × 15 mm/1.3 × 1.7 × 0.6 inch (L*W*H) SCS8UU Ball Bearings Size: 30 × 35 × 22 mm/1.2 × 1.4 × 0.9 inch (L*W*H) Included Components: Rail Guide, SCS8UU Bearings, SK8 Rail Support Color: Silver Material: Aluminum, Carbon Steel Hardness: 58-64 HRC Surface Hard-thickness: 0.8 – 2.5mm Surface Roughness: 0.8S – 1.6S Straightness: Below 5μm/100mm Surface Chrome Thickness: 15um-20um Surface Finish Quality: Ra 0.8 Description: .