Item Type: Linear Guide Material: Stainless Steel Model: MGW12C-100-1R Slider Size: Approx. 46 x 40 x 10.5mm / 1.8 x 1.6 x 0.4in Slide Rail Size: Approx. 100mm / 3.9in Slide Rail Fixing Bolt Size: Approx. M4 x 8 1Equipped with steel ball retainers to ensure safety during transportation and easy assembly as well as safe use of sliders. 2Adopts two row type ball cycle design, the contact angle of the ball track is 45 degrees, so as to achieve the optimize using effect. 3The use of larger size steel ball to improve the load capacity, fully show the strong load and high torsion function. 4Guide surface hardness is HRC59.5, easy and convenient for installation, wonderful accessory. 5Made of quality stainless steel material, effectively resist oxidation, prevent rust and has long service life.1 x Linear Guide