Specification Brand : Fafeicy BulletPoint1 : These bearings are made from high quality carbon steel for durability and long service life BulletPoint2 : Bearings have 1.4mm deep V that generally ride on a rail or track BulletPoint3 : They are double shielded to avoid contaminants entering and save lubricant BulletPoint4 : These are Professional bearings that are used in many linear motion systems BulletPoint5 : There comes total 20 pieces bearings which you may use for many different projects Color : White ExternallyAssignedProductIdentifier : 3641279782647 ExternallyAssignedProductIdentifier1 : 7316577063823 ExternallyAssignedProductIdentifier2 : 07316577063823 IncludedComponents : inc ItemName : 20pcs V623ZZ V Ball Bearing Pulley V Angle 90° for Rail Track Linear Motion System ItemPackageDimensions_Height : 11.2014 centimeters ItemPackageDimensions_Length : 0.2032 centimeters ItemPackageDimensions_Width : 7.0104 centimeters ItemPackageQuantity : 1 ItemShape : Round ItemTypeKeyword : deep-groove-ball-bearings Manufacturer : Fafeicy Material : Carbon Steel Material1 : Plastic Material2 : Nylon MeasurementSystem : Metric ModelNumber : Fafeicydty1hr7aik NumberOfItems : 1 NumberOfPieces : 4 PartNumber : Fafeicydty1hr7aik ProductDescription : Features: These bearings are made from high quality carbon steel for durability and long service life. They are double shielded to avoid contaminants entering and save lubricant. Bearings have 1.4mm deep V that generally ride on a rail or track. These are Professional bearings that are used in many linear motion systems. There comes total 20 pieces bearings which you may use for many different projects.