ITEM NAME:1pcs SCS8UU 8mm Linear motion ball slide units bearing block Al Rail guide sC2W3 1pcs SCS8UU 8mm Linear motion ball slide units bearing block Al Rail guide sC2W3 100 % brand new Linear Motion Slider Unit Bearing Housing Aluminum Rail Guide CNC3D Printer Accessories Material: Aluminum size:8mm Colour:Red Quantity: 1 pcs Package Contents: 1 x Linear motion ball slide Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm..Linear Motion Slider Unit Bearing Housing Aluminum Rail Guide CNC3D Printer Accessories. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.