Fits Perfectly in 3D Printer Pillow Block. Please be aware of people who leave one star reviews, these only work if your rods are not bent. IF rods are bent, they lock up and don't work correctly. These do not need any lube or grease, they are self lubricating.The Drylin has the lubrication built in. High Quality Authentic Igus RJ4JP-01-08 Sold polymer Linear bearing Lubrication is built into the polymer, no need to use any oil or grease. These slowly release lubrication as they slide, and using additional lubrication will decrease the life and could cause performance issues
Specification: Inner diameter: 8mm Outer diameter: 15mm Size: 2.4x1.5cm/0.94x0.59inch Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!