This item will be shipped within One Week Returns Subject to 15% restocking Fee SSUCFB210-50mm Stainless Steel Flange Bracket 3 Bolt Set Screw Locking 50mm Inner Diameter Ball Bearing SSUCFB210-50mm Stainless Steel Flange Bracket 3 Bolt Ball Bearing, SSUCFB210-50mm 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.