HotSpring Spa Jetstream Nozzle Seat Ring. The nozzle seat ring goes on the backside of the 1991-1993 and 1997-current Hot Spring, 1992-1993 and 1997-current Tiger River JetStream Jet nozzle (eyeball). Its purpose is to provide a slick Teflon like backing for the nozzle to pivot against while also being held firmly enough in place to prevent it from rattling. These can deteriorate over the years and break into small pieces.
