ITEM NAME:SCS20UU 20mm Linear Motion Ball Bearing Slide Bushing Block Steel T1B2 SCS20UU 20mm Linear Motion Ball Bearing Slide Bushing Block Steel T1B2 Material: Aluminum alloy Model: SCS20UU Shaft Diameter: 20mm Colour:Silver.Model: SCS20UU. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing.