Hayward SPX1600PN Swivel Nut & Knob for Super Pump This standard butterfly gasket is

This standard butterfly gasket is designed to use with Hayward automatic skimmer models SP1091LX

Also fits Pentair Sta-Rite SuperMax

1-1/2-Inch FIP x 2-Inch MIP

Also fits hayward pro series top-mount

SharkVAC by Hayward is one of the most economical pool cleaners to operate - equivalent to the energy used by a standard light bulb

Hayward SPX1600PN Swivel Nut & Knob for Super Pump This standard butterfly gasket isThis swivel nut and knob is designed to use with Hayward SuperPump models SP1600X5, SP1605X7, SP1607X10, SP1608X10, SP1610X15, SP1611X15, SP1615X20, SP1616X20, SP1621X25 and also compatible with Hayward MaxFlo pump model SP2810X15.