Specification Brand : SAHUL BulletPoint1 : Surface Roughness : Ra 0.2 BulletPoint2 : Torque Capacity : 20X37X9 mm BulletPoint3 : Structure : Deep Groove BulletPoint4 : Model Number : 6904 CE ABEC-9 BulletPoint5 : Material : Ceramic Color : One Color ExternallyAssignedProductIdentifier : 9779123154044 ItemName : 1Pcs 6904 CE Full Ceramic Bearing 20X37X9mm ABEC-9 Ceramic Bearing 6904 ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : flanged-sleeve-bearings Manufacturer : SAHUL ModelNumber : SAHUL NumberOfItems : 1 PartNumber : SAHUL ProductDescription : Full Ceramic Bearings New upgraded full ceramic bearing second generation ABEC-9 Secret Weapon for long distance casters Cast longer and faster bearing can work in salt water High speed bearing make you cast longer and faster Ceramic by its nature is lighter than steel by about 2/3 the wieght, it is harder than steel when it is in ball form and it is virtually frictionless because it is non-porous. Welcome to Lingfeng Store