Pac Fab (191424) Star 40, Mytilus B Bottom Piping O-ring  

Speck Pump Casing O-ring Model 420/90/433/S90/98/E90 Speck Pump (2920141210) Adapter O-ring Model 21-80BS 

Prior to (1/1995) Diffuser E90 O-ring Model 98/Model 90/433