6311ZENRBNLM Nachi Bearing Shield C3 Snap Ring 55x120x29 Bearing6311ZENRBNLM Nachi Bearing With Snap Ring and Shield Made in Japan 6311ZENRBNLM Nachi Bearing With Snap Ring and Shield, the 6311ZENRBNLM inner diameter is 55mm, the 6311ZENRBNLM outer diameter is 120mm, 6311ZENRBNLM width is 29mm. 6311ZENRBNLM Nachi Ball Bearing Nachi Deep groove Ball Bearing Closures: Double metal shields (ZZ) for added protection ZNR ZZNR 2ZNR Clearance: C3 (increased internal clearance for higher speed or thermal expansion)