Designed with a ball retainer, which enables interchangeability in the case of small precision Adopting 4-point contact design, it can bear load from all directions and has good strength and high precision Widely used for automatic equipment, precision measuring equipment and many other machines requiring precision linear motion Professional and technical rail and block, strong and durable Block has lubrication system , the lubricating oil can be easily put into the oil inlet on the side Feature: Professional and technical rail and block, strong and durable. Adopting 4-point contact design, it can bear load from all directions and has good strength and high accuracy. Designed with a ball retainer, which allows interchangeability in the case of small precision. The block has a lubricating system, the lubricating oil can be easily fed into the oil inlet on the side. Widely used for automatic equipment, precision measuring equipment and many other machines requiring precision linear motion. Specifications: Model: HGR20 Type: Slide rail Slide rail: linear rail Length: 400mm / 15.7inch Width: 15mm / 0.6 inch Rated static load: 25.31 knots Fixed bolt size: x 16mm Material: bearing steel Static moment: 0.17kn*m Number of Sliders: 2 Weight: 2740g / 96.7oz (Approx.) Package List: 1 x Linear Guide Rail 2 x linear guide block