MGN12H Mini Linear Rail Guide 250300 400500 550mm Linear Sliding Gide with MGN12H Carriage Block for DIY 3D Printer and CNC Machine 500mm

-- MGN12 250/ 300/ 400/ 500/ 550mm Miniature Linear Rail Slide + MGN12H Carriage for 3D Printer Accessories. Widely used for Semiconductor manufacturing equipment, printed circuit board IC assembly equipment, medical equipment; machine arm, precision measuring instruments, office automational equipment and other small linear sliding devices.  -- Our product is in good quality at a rock-bottom price, and we promise that 100% money refund if you are not satisfied with this rail block. Just feel free to place order, and we are here to solve you any questions about our products.  Specifications: Material: Metal Type: Slide guide rail Slide track: Linear guide rail Accuracy level: H  Length(Optional):  Approx. 250mm/9.8inch, 300mm/11.8inch, 400mm/15.7inch, 500mm/19.6inch, 550mm/21.6inch Installation screw size(not included): M6(Rail),  M3(Block)  Weight: 217~417g Package Included: 1 × MGN12 Linear Guide Rail 1 × MGN12H Slide Block  Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.