Description: Features: brand new and high quality. Made of steel material. Durable and sturdy, can be used for a long for time. Suitable for 3D printer parts. Good interchangeability, easy to install. The mechanical structure is novel, small and light. It is great for linear motion on 3D printer, CNC, and other applications. Specifications: Item Type: Linear Bearing Bushing Model: LM6UU Material: Steel Color: Silver Tone Size: (Approx.) Internal diameter: 6mm/0.24in External diameter: 12mm/0.47in Length: 19mm/0.75in Shape: cylindrical Quantity: 1 Set(5Pcs) (other accessories demo in the picture is not included) Note: 1.Transition: 1cm=10mm=0.39inch 2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 5 X LM6UU Linear Bearing Bushing For 3D Printers Parts (No retail package)