6003ZEC3BNLM Shielded Nachi One Shield Ball Bearing One Bearing Made in Japan 6003ZEC3BNLM Nachi Bearing, the 6003ZEC3BNLM inner diameter is 17mm, the 6003ZEC3BNLM outer diameter is 35mm, 6003ZEC3BNLM width is 10mm.