# Duncan Ball Bearing Kit

**URL:** <https://forums.yoyoexpert.com/t/duncan-ball-bearing-kit/60503>\
**Category:** General Yo-Yo\
**Created:** [October 24, 2013, 2:41am UTC](https://forums.yoyoexpert.com/t/duncan-ball-bearing-kit/60503 "2013-10-24T02:41:53Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![savannah.chris](https://avatars.discourse-cdn.com/v4/letter/s/5fc32e/32.png) [@savannah.chris](https://forums.yoyoexpert.com/u/savannah.chris)\
**Post date:** [October 24, 2013, 2:41am UTC](https://forums.yoyoexpert.com/t/duncan-ball-bearing-kit/60503/1 "2013-10-24T02:41:53Z")

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What size is the ball bearing? Also are rubber rings the same as friction stickers?  
Pm me with the answer please…  
Thanks!

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**Author:** ![turtleyo](https://avatars.discourse-cdn.com/v4/letter/t/d07c76/32.png) [@turtleyo](https://forums.yoyoexpert.com/u/turtleyo)\
**Post date:** [October 25, 2013, 4:13am UTC](https://forums.yoyoexpert.com/t/duncan-ball-bearing-kit/60503/2 "2013-10-25T04:13:57Z")

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The bearing is an A sized, and the O-rings are for adjusting the gap of the throw.