Pump seal most often found in Waterway wet ends, also American, Aqua Flo Bronze, Koller, Polaris Vacuum Sweep Pump, Premier, Sta-Rite Bronze, and others.
Carbon sealing surface diameter is 1" maximum, Outer flange is 1 9/16" diameter.
Ceramic sealing face is 1 3/32" maximum diameter,
Rubber sealing cup is 1 1/4" max, with an inner hole diameter of 11/16".