Features:Thislinear rail and blockare small in size andlightweight, especially suitable for small equipment.Adopting 4-point contact design, it canbear load from every direction, and has good strength and high accuracy.Designed with ball retainer, which allowsinterchangeability in the case of allowable precision.Slide block is designed with mini retaining steel wire, and the steel ball will not fall off if taking the slide block down.Widely used for automatic equipment,precision measuring equipment, and many other machines that need precisionlinear movement.Specification:Model: MGN12H (extended)Type: Slide railSlideTrack: Linear railLength: 1000mm / 39.4inWidth: 27mm / 1.06inMaterial: Bearing steelBlock FixationMethod: LockedWeight: 719g / 25.4oz (approx.)Package list:1 *Linear Guide Rail 1 * LinearGuideBlock.