Replacement Pump Shaft Seal Seal Type 21 Shaft Size (In.) 1 1/2 in Nominal Working Length (In.) 1.125 in Seat Bore 2.125 in Seat Thickness 0.437 in Material Content Code BCFJF Seal Material - Standard Industry Seal Number 11504 382 758 Max Temp (F) 225 Degrees F Min Temp (F) -40 Degrees F Replacement For Crane Type 21 and Sealol Type 43 US Seal Type C