Features: _x000D_ These miniature bearings are made of high quality steel for low noise and long service life. _x000D_ They are double rubber sealed to avoid contaminants entering and save lubricant. _x000D_ Bearings have a3mm inner diameter, a 10mm outer diameter, and a 4mm thickness. _x000D_ These are great for 3mm shaft/rod projects such as mechanical equipment,electrical instruments, toys._x000D_ _x000D_ There comes total 10 pieces miniature bearings which you may use for many different projects. _x000D_ _x000D_ _x000D_ Specifications: _x000D_ ISO Certificate ISO 9001:2008 _x000D_ Dimension ID (Inner Diameter): 3mm _x000D_ OD (Outer Diameter): 10mm _x000D_ Thickness: 4mm _x000D_ Material Chrome Steel _x000D_ Qty 10 PCS _x000D_ ABEC Tolerance Codes ABEC 1 _x000D_ Closure codes 2RS (Two side rubber seals) _x000D_ Lubrication Wide Temperature Range: - 20to 120 _x000D_ Basic Load Ratings Cr KN = 0.64 _x000D_ Cor KN = 0.23 _x000D_ Vibration Level Z1 (P0) _x000D_ _x000D_ _x000D_ _x000D_ Package Includes: _x000D_ 10 x Bearings 1These miniature bearings are made of high quality steel for low noise and long service life 2They are double rubber sealed to avoid contaminants entering and save lubricant 3Bearings have a3mm inner diameter, a 10mm outer diameter, and a 4mm thickness 4These are great for 3mm shaft/rod projects such as mechanical equipment,electrical instruments, toys. 5There comes total 10 pieces miniature bearings which you may use for many different projects