Product features: 
Product Name: Linear Motion Bearings 
Model: Various
Main material: carbon steel, rubber 
Inner diameter:8-12 mm 
Outer diameter:12-21 mm 
Total length: 19-30 mm 
Quantity: 1pc 

Product description: 
The universal ball bearings is great to replace the damaged ball bearings in your devices and therefore improving the efficiency and energy saving. Widely used in home appliances, industrial, low noise and high speed electric motors, construction machinery, automotive components, pumps, and machinery. Smooth moving, low friction, high rigidity and long life. Economical, easy to maintain replace. 

IMPORTANT NOTES: 
1. Marvle3D also provides high-standard 3d printing service, and 3d printer repair and upgrading service. Please contact us for further details. 
2. Marvle3D committed to providing prompt delivery service and all products stored in local. 
3. Marvle3D is operated by a GST registered company. Tax invoice is available on request.