ITEM NAME:SCS8UU 8mm Linear motion slide units bearing block Al Rail guide shaft CNC W4I5 SCS8UU 8mm Linear motion slide units bearing block Al Rail guide shaft CNC W4I5 color:SILVER Material: METAL size:18*18*36 mm SCS8UU 8mm Package Includes: 1x Linear motion slide units bearing block Rail guide 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.