Specification Brand : NTN BulletPoint1 : Model Number: 6900ZZ BulletPoint2 : Size: Inner diameter 0.4 x Outer diameter 0.9 x width 0.2 inches (10 BulletPoint3 : Type: Double-shielded BulletPoint4 : Material: High carbon chrome bearing steel BulletPoint5 : Package Content : 10 x Groove Ball Wheel Bearings ExternallyAssignedProductIdentifier : 4977292498920 ExternallyAssignedProductIdentifier1 : 712662204527 ExternallyAssignedProductIdentifier2 : 711331508577 ExternallyAssignedProductIdentifier3 : 0711331508577 ExternallyAssignedProductIdentifier4 : 0712662204527 IncludedComponents : No ItemName : NTN Bearing ZZ ItemPackageDimensions_Height : 7 centimeters ItemPackageDimensions_Length : 2.4 centimeters ItemPackageDimensions_Width : 4.8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : deep-groove-ball-bearings Manufacturer : エヌティエヌ(NTN) Material : High Carbon Chrome Bearing Steel ModelNumber : 6900ZZ NumberOfItems : 1 PartNumber : 6900ZZ Pattern : 00ZZ ProductDescription : These good precision 6001RS bearings provide high speed and the convenience of removal shields for cleaning and relubrication. This is the perfect bearing for all your skateboard applications. Bearing has Double Rubber Seals to protect the bearing from dust or any possible , also bearings are pre-lubricated with grease.