Item Type: Linear Guide_x000D_ Product Material: Stainless steel_x000D_ Product Model: MGW9C-100-1R_x000D_ Slider Size: Approx. 38.3 x 30 x 9mm / 1.5 x 1.2 x 0.4in_x000D_ Number of Sliders: 1Pc_x000D_ Slide Rail Size: Approx. 100mm / 3.9in_x000D_ Slide Rail Fixing Bolt Size: M3x8 1Designed with steel ball retainers to ensure safety during transportation and easy assembly as well as safe use of sliders. 2Miniature guide rail series adopts two?row ball circulation design, and the ball track design adopts Gothic structure. 345 Degrees contact angle to achieve the desired effect. The surface hardness of the guide rail is HRC59.5. 4Larger size steel balls to improve the load capacity and fully demonstrate the high load and high torsion functions 5The miniature guide rail series are all made of stainless steel hardened heat?treated materials, whether it is a slide rail, a slider steel body, and a ball1 x Linear Guide