6309ZZENRC3BXMM Nachi Bearing With Snap Ring (C clip) Made in Japan 6309ZZENRC3BXMM Nachi Bearing with a Snap Ring, the 6309ZZENRC3BXMM inner diameter is 45mm, the 6309ZZENRC3BXMM outer diameter is 100mm, 6309ZZENRC3BXMM width is 25mm.