Feature:
- Size: 8*15*24 MM (inner diameter * outside diameter * height). 
 Material: Housing : Gcr15 steel, harden.
- Ball:Chromium steel Gcr15, heat treatment, hard chrome plated. 
 Main dimensions:ID:8MM,OD:15MM,Length:17/24MM
- The jacket is made of carbon chromium bearing steel, through hardened and precision ground handling, providing safe and reliable for the bearing sleeve and the bearing housing assembly. 
- Ball in the cage loop to run a smooth ball guide surface to ensure even if high-speed operation, low noise.