Features:
These liner-motion bearings are made of high quality bearing steel for low noise and long service life. They are double sealed to avoid contaminants entering and save lubricant. Bearings have a 12mm inner diameter, a 20mm outer diameter, and a 30mm height. These are great for small hobby 12mm shaft/rod projects such as 3D printer, engraving machine.
There comes total 10 pieces bearings which you may use for many different projects.

Specifications:
Type: LM12UU
Material: Bearing steel
Inner Diameter: 12mm / 0.47"
Outer Diameter: 20mm / 0.78"
Height: 30mm / 1.18"
Quantity: 10pcs

Package Includes:
10 x Bearings