HGR20 400mm Linear Guide Rail Slide Carriage CNC Router with 2pcs Rail Block Features: Professional and technical rail and block, strong and durable. Adopting 4-point contact design, it can bear load from every direction, and has good strength and high accuracy. Designed with ball retainer, which allows interchangeability in the case of small precision. Block has lubrication system, lubrication oil can be easily put into the oil inlet on the side. Widely used for automatic equipment, precision measuring equipment, and many other machines that need precision linear movement. Specification: Model: HGR20 Type: Slide rail Slide Track: Linear rail Length: 400mm/15.7inch Width: 15mm/0.6inch Rated Static Load: 25.31 kn Fixed Bolt Size: M4 x 16mm Material: Bearing steel Static Moment: 0.17 kn*m Number of slider: 2 Weight: 2740g / 96.7oz(approx.) Package List: 1 x Linear Guide Rail 2 x Linear Guide Block