Item Type: Linear Rail Material: Stainless steel Model: MGW12C-400-2R Slide Block Size: Approx. 46 x 40 x 10.5mm / 1.8 x 1.6 x 0.4in Slide Block Number: 2 Slide Rail Size: Approx. 400mm / 15.7in Slide Rail Fixing Bolt Size: M4 x 8 Package List 1 x Linear Rail 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 tworow ball circulation design with a contact angle of 45 to achieve a balanced load. 32 widened slider design, and use larger size steel ball to achieve high load and high torsion performance. 4Using stainless steel hardened heat-treated material, rust and corrosion resistance, the surface hardness of the guide rail reaches HRC59.5. 5The slide rail is fixed by standard bolts, which is stable during operation, will not slip, and can be accurately positioned.