Flanged Standard Seal for Stainless Steel Pump (3/8 Inch I.D.). Package of 2. Requires quantity two for dual pumps. Main piston seal and backup washer (if required), Flush piston seal, Flush diaphragm (if required), o-ring, guide bushing (for no-flush conversion, if required), Replacement tools and instructions.Estimated Shipment Time (After Receipt of Order): 21 Day(s)