Widely used for digital 3D coordinate measuring equipment, precision machinery, and special machinery industries. Suitable for various electronic equipment, guide bars, drive shafts, and pillar bearings. Pillow block bearings offer reliable load capacity, fit standard precision racks, and provide strong adaptability. Smooth movement, low friction, high rigidity, and long service life. Features good wear resistance, corrosion 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 Bearings - 4 x Rail Support Guides - 2 x Linear Shaft Optical Axes Note: Light and display differences may cause slight color variations between the image and the actual item. Measurement error allowance: +/- 1-3cm.