The Pentair 350091 Pump Lid fits Pentair SuperFlo and Pumps and Sta-Rite SuperMax Pumps. This clear lid has a 7 inch outside diameter and the diameter of the inner lip on the bottom of the lid is 5-3/4 inches. It is held on by a clamp which is sold separately. This is a factory original Pentair Sta-Rite replacement part.