Specification: Material: solid polymer, aluminum Model: SC12UU Inner diameter: 12mm Single weight: 260g Quantity: 4pc Application: For 3D printer, CNC Features: 1. New solid polymer material, light weight, good wear resistance and resistance, more stable. 2. perfect for the replacement of the linearing ball. 3. Not necessary, self-lubricating, dustproof. 4. Improve their efficiency and energy saving. 5. Widely used in household appliances, low noise, high speed electric motors, construction machinery, automotive components, pumps and machinery. Smooth movement, low friction, high rigidity and long service life. Economical, easy to maintain
