Widely used for digital 3D coordinate measuring equipment, precision equipment, and special machinery industry applications Suitable for various electronic equipment, guide bars, drive shafts, and pillars Pillow block bearings offer reliable load capacity, compatible with standard precision racks and demonstrate strong adaptability Smooth operation, low friction, high rigidity, and extended service life Excellent wear resistance, resistant to rust, high precision, and good structural strength Color: Silver Material: Aluminum alloy Steel linear shaft optical axis specifications: Outer diameter: 8mm (0.31 inch) Length: 200mm (7.87 inch) Linear rail support guide shaft bearing specifications: Product size: 42 x 32 x 11mm (1.65 x 1.26 x 0.43 inch) Inner diameter: 8mm (0.31 inch) (compatible with 8mm optical axis) Package size: 45 x 35 x 30mm (1.77 x 1.38 x 1.18 inch) Linear ball bearing specifications: Inner diameter: 8mm (0.315 inch) Length: 34.5mm (1.36 inch) Package contents: 4 x Linear motion ball bearings 4 x Rail support guides 2 x Linear shaft optical axes The package includes only the items listed above; other accessories are not included Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement tolerance: +/- 1-3cm