ITEM NAME:16 mm SC16UU Linear Ball Bearing Slider Slide CNC Bushing For Replacemen hv2n Product Description Description: 100% Brand New and High Quality Model: SC16UU Shaft ID:16mm Shaft OD:28mm Quantity: 1pc Weight:201g Included: 1 x SC16UU Ball Bearing Slide Bushing.Model: SC16UU. Included: 1 x SC16UU Ball Bearing Slide Bushing. Shaft ID:16mm. Shaft OD:28mm. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.