Item Type: Linear Guide Material: Stainless steel Model: MGW9C-200-1R Slide Block Size: Approx. 38.3 x 30 x 9mm / 1.5 x 1.2 x 0.4in Slide Rail Size: Approx. 200mm / 7.9in Slide Rail Fixing Bolt Size: M3 x 8 Package List 1 x Linear Guide 1The slider has a high rigidity retainer, the slider is easy to assemble and use, and it is easier to slide. 2The linear guide is a two-row ball circulation design with a contact angle of 45 to achieve a balanced load. 3The slider is designed to be widened and uses larger size steel balls to fully demonstrate high load and high torsion performance. 4Using stainless steel hardened heat-treated material, anti-rust and corrosion-resistant, the surface hardness of the guide rail reaches HRC59.5. 5The linear guide is rolling friction, when the bed is running, there will be no slipping situation and can be accurately positioned.