ITEM NAME:16 mm SC16UU Linear Ball Bearing Slider Slide Bush For Replacement CNC D3X5 16 mm SC16UU Linear Ball Bearing Slider Slide Bush For Replacement CNC D3X5 Model: SC16UU Shaft ID: 16mm Shaft OD: 28mm Quantity: 1 piece Color: Silver Material:Aluminum Included: 1 x Linear Ball Bearing 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.