Features:Thislinear rail and blockare small in size andlightweight, especially suitable for small equipments.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 small precision.Blockhaslubrication system lubrication oil canbe easily put into the oil inlet on the side.Widely used for automatic equipment,precision measuring equipment, and many other machines that need precisionlinear movement.Specification:Model: MGN12(linear rail), MGN12B(slide block)Type: Slide railSlideTrack: Linear railRailLength: 250mm or 9.8inRailWidth: 12mm or 0.5inMaterial: Bearing steelBlock FixationMethod: LockedWeight: 236g or 8.3oz (approx.)Package List:1 xLinear Guide Rail 2 x LinearGuideBlocksNote: Please allow small size error due to manual measurement. Thanks for your understanding.