Widely used for digital 3D coordinate measuring equipment, precision machinery, and special industrial machinery Suitable for various electronic equipment, guide bars, drive shafts, and pillars Bearing pillow block has reliable load capacity, compatible with standard precision racks, and offers strong adaptability Smooth operation, low friction, high rigidity, and long service life Excellent wear resistance, corrosion resistant, high precision, and good structural strength Color: Silver Material: Aluminum alloy Steel linear shaft optical axis: 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 color variations between the image and the actual item. Measurement tolerance: 13cm