Igus Drylin R Solid Polymer Linear Slide LM8UU Bearing, RJ4JP-01 - 8mm Shaft (4 pack)

8 mm inner diameter Fits perfectly in 3D printer pillow block Self lubricating, not oil or grease needed Replaces stock LM8UU bearing used in 3D printers 4 pcs per pack and installs easily in x and y axis