General description These 4PCS SBR16UU Linear Ball Bearing Slide Blocks are designed for use in CNC machines, electronic equipment, and drive shafts, providing smooth and efficient linear motion. Technical specifications Material: Metal Color: Silver Inner diameter: 16mm Measurement error: +/- 1-3cm Package Contents 4 x SBR16UU Linear Ball Bearing Slide Block Other information Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product.