ITEM NAME:SC8UU 8mm Linear Motion Ball Bearing Slide Bushing Linear Shaft for CNC Product Description Description: SC8UU 8mm Linear Motion Ball Bearing Slide Bushing Linear Shaft for CNC for 3D Printer Features: Mainly used for 3D printers, but also widely used in other electronic equipment, food machinery, packaging machinery, medical machinery, printing machinery, textile machinery, machinery, equipment, robots, tools, machinery, machine tools, automotive and digital three-dimensional coordinate measuring equipment and other precision equipment or special machinery industry. Specifications: Model: SC8UU Inner diameter: 8mm/0.31" Main Application: Use linear guide Shell Material: Plastics Size: 35*30*25mm/1.38*1.18*0.98" Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow slight measuring deviation due to manual measurement. Included: 1 X Motion Ball Bearing.Model: SC8UU. Main Application: Use linear guide. Included: 1 XMotion Ball Bearing. 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.