Specification Brand : Cubitron II BulletPoint1 : Replacement parts are easy to find BulletPoint2 : Detailed schematic and parts list found in the tool instruction manual make it easy to identify the part(s) you need BulletPoint3 : Genuine 3M replacement parts will provide new tool performance after maintenance and repair tasks are performed BulletPoint4 : Each and every part is available individually BulletPoint5 : Available in a variety of dimensions CompatibleMaterial : Stone ExternallyAssignedProductIdentifier1 : 051141303055 ExternallyAssignedProductIdentifier2 : 0051141303055 ExternallyAssignedProductIdentifier3 : 00051141303055 IncludedComponents : Abrasive Accessories ItemName : Cubitron II 30305 O-Ring ItemPackageDimensions_Height : 5.5 inches ItemPackageDimensions_Length : 0.03 inches ItemPackageDimensions_Width : 3.25 inches ItemPackageQuantity : 1 ItemTypeKeyword : abrasive-dressing-tools Manufacturer : 3M Material : Rubber Material1 : Diamond Material2 : Alloy Steel ModelName : 20803 ModelNumber : 30305 NumberOfItems : 1 PartNumber : 30305 ProductDescription : Our 3M diamond phono point tool features sharp, sturdy diamonds used for internal radii dressing applications. This tool is for general tool room dressing on concave and Convex small diameter grinding wheels. ProductSiteLaunchDate : 2012-02-01T15:47:30.590Z Size : 0.4375 In x 2 In StreetDate : 2017-03-02T00:00:01Z Style : 0.50 Carat SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 1