This part is a Black Smooth 3 5/8" Spa Diverter Cap, Handle Knob & O-Ring Kit only.
This is a NON Buttress style Cap if your cap has the word Buttress stamped in it look in our store for a Buttress cap.
This Diverter Cap mounts on top of the Diverter Valve with the Stem sticking through that the (2) Small O-Rings god on then this handle goes in top of the stem square The Large O-Ring fits on the body under the cap.
The Diverter Valve that this part fits is used to Divert Water into different sides of a hot tub and fits many different brands.
The outside measurement of the Cap is about 3 5/8" the inside thread measurement is about 2 3/4" and the center hole where the stem and o-rings go measures about 3/4", Then the handle is about 4" long end to end and 2" wide side to side at thew widest part and the square hole in handle is 7/16" wide.
This Part is used in Many Brands of Hot Tubs With Black Colored Parts.