Check the listing for details. Cal Spa Diverter "BUTTRESS" Cap & O-Rings 3 1/2" Valve Hot Tub. Condition: New. Listed at 19.99 USD. This part is a 3 1/2" Cal Spa Style BUTTRESS Diverter Cap and O-Ring Set only. This BUTTRESS Diverter Cap Slides on the Diverter Valve Stem is used to operate the Diverter Valve and is for Cal Spas. This Part is used mostly in Cal Spa Hot Tubs. This listing is for the Cap & O-Rings only all other parts shown are for illustration only and the complete valve is sold separately. Be sure to look and feel on the inside for the word BUTTRESS. Note: We offer the Cap with knob, Cap alone and cap with stem and o-rings in our store.This part is a 3 1/2" Cal Spa Style BUTTRESS Diverter Cap and O-Ring Set only. This BUTTRESS Diverter Cap Slides on the Diverter Valve Stem is used to operate the Diverter Valve and is for Cal Spas. This Part is used mostly in Cal Spa Hot Tubs. This listing is for the Cap & O-Rings only all other parts shown are for illustration only and the complete valve is sold separately. Be sure to look and feel on the inside for the word BUTTRESS. Note: We offer the Cap with knob, Cap alone and cap with stem and o-rings in our store.