Specification Brand : Hyuduo BulletPoint1 : The bearing is suitable for quiet, high-speed and precision equipment. BulletPoint2 : Model: SBR30UU, 30mm Inner diameter BulletPoint3 : The bearing is made of high-quality aluminum alloy material. BulletPoint4 : Cooperate with open linear bearing to ensure excellent sports performance. BulletPoint5 : If you have any problems with the product you received, please feel to us to resolve. ItemName : SBR30UU 30mm Linear Bearing Pillow Block, SBR30 UU Open Linear Bearing Slide Block CNC Router Parts ItemPackageDimensions_Height : 7.5946 centimeters ItemPackageDimensions_Length : 5.8928 centimeters ItemPackageDimensions_Width : 7.3914 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : pillow-block-bearings Manufacturer : Hyuduo Material : Aluminum PartNumber : Hyuduot8fyi3c7sn467 ProductDescription : Specification: Material: Aluminum alloy Weight: 598g/21.1oz Model: SBR30UU Height: 56mm Inner diameter: 30mm Purpose: device Lubricant: oil lubrication Lubrication method: drip lubrication