ACB-3645-40-C-RS Headset Bearing, this bearing measures 40.0id x 51.8mmod x 8 width with an internal angle of 36 ° and external angle of 45 °
ACB-3645-40-A-RS Headset Bearing, this bearing measures 30.15id x 41mmod x 6.5 width with an internal angle of 36 ° and external angle of 45 °
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