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 offers reliable load capacity, fits standard precision racks, and provides strong adaptability. Ensures smooth movement, low friction, high rigidity, and long service life. Features good abrasion resistance, rust resistance, high precision, and excellent strength. Color: Silver Material: Aluminum alloy Specifications: Steel Linear Shaft Optical Axis: - Outer diameter: 8mm (0.31 inch) - Length: 200mm (7.87 inch) Linear Rail Support Guide Shaft Bearing: - Product Size: 42 x 32 x 11mm (1.65 x 1.26 x 0.43 inch) - Inside 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: - Inner Diameter: 8mm (0.315 inch) - Length: 34.5mm (1.36 inch) Package Contents: - 4 x Linear Motion Ball Bearing - 4 x Rail Support Guide - 2 x Linear Shaft Optical Axis Note: The package includes only the items listed above. Other products are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement tolerance: 13cm.