Linear Guide Rail High Precise 4 Point Contact Linear Rail with 2 Sliding Blocks for 3D Printer CNC XYZ Carving Machine 400mm/15.7in Item Type: Linear Guide Rail Material: Bearing Steel Slider Size: Approx. 22.5x17x6.5mm/0.89x0.67x0.26in Basic Dynamic Rated Load: C: 0.98 (k/N) C0: 1.24 (k/N) Allowable Static Moment: MR: 4.7 (N-m) MP: 2.84 (N-m) My: 2.84 (N-m) Sliding Trajectory: Linear Guide Rail Number of Sliders: 2 Accuracy Grade: H Fixing Method of Slider: Locked type Features: 1. The MGN series is small in size and lightweight, suitable for small equipment use 2. The slider and slide rail are made of bearing steel, anti slip, long lasting 3. Adopt four point contact design, it can withstand loads in all directions and has strong rigidity and high accuracy 4. Equipped with steel ball holder design, it has interchangeability with allowable accuracy