This SCE1216 Needle roller bearing is suitable for beetleweight robots.  It is used in our 3lb robot kit Vector

Specification

• ID: 3/4"
• OD: 1"
• Width: 1"
• Weight: ~30g

Made out of Chrome Steel SAE-52100

Lubricated with light oil

This part is interchangeable with the following part numbers.

SCE1216, J1216, BA1216ZOH, B1216, BA1216