This item will be shipped within One Week Returns Subject to 15% restocking Fee SSUCF206-30mm Stainless Steel Flange Units 4 Bolt Set Screw Locking 30mm Inner Diameter SSUCF206-30mm Stainless Steel Flange Units 4 Bolt Ball Bearing, SSUCF206-30mm is Set Screw Locking, bearing has solid base housing construction, bearing has wide inner ring, bearing is relubricatable unit with anti-rotation pin, bearing has supplied with water and wash resistant mobilgrease.