Features 1、Strong interchangeability, support silver guide rail block interchange 2、High accuracy, the accuracy error within one meter does not exceed two-wires 3、The rail adopts DB back-to-back configuration to improve product rigidity and durability 4、Reference surface design at the bottom of the guide rail, no ripple 5、The dust pads at both ends are thickened to effectively prevent dust from entering and have a longer service life. Specification Item Type: Guide Rail + Slide Block Load Direction: Radial thrust Bearing Mechanism: Static bearing Lubricant: Oil lubrication Oil Lubrication Method: Drip oil lubrication Lubrication State: Boundary lubrication Bearing Material: Cast iron Use Characteristics: High speed Strong Interchangeability: Support silver guide rail slider interchange Linear Guide Size: 20/30/40/50x1.5x1.5cm Slide Block Size: Approx. 6 x 3.5 x 2.5cm / 2.4 x 1.4 x 1in Package List 2 x Linear Guide Rail 4 x Slide Block 1 Bag Accessories