Description the most popular 2″ Hottub Heater Gasket Oring/Gasket, which is a combination of Gasket and O-ring and used by most Heater Manufacturers, including Balboa, Waterway, Gecko, Hydro-Quip, Spa Builders, Correct-Tech and many more. You are getting (2) Gasket/O-rings here ONE Pair of 2″ Gasket Orings For Heaters And Unions For 2″ Pipework It’s a Gasket with a Built in O-ring. Use With Most Heater Unions, including Balboa, Waterway, Gecko, Hydro-Quip, Spa Builders and many more. Actual Meaurement: 3 Inches / 75mm outside diameter 70mm inside
