You are buying a Kit which contains (2) 2″ Heater Split Nuts, (4) Screws and (2) Gaskets to be used with a 2″ Heater Tube & Union. The Heater Flange Split Nut mounts to the heater tube the usage of 2 screws to carry it in place and screws onto the heater threaded union with a gasket between the union and tube. If your plumbing is 2″ and your heater is 2″ this part is correct. This version is the most well liked version. 1 1/2 x 1 1/2 is 2nd hottest and 1 1/2″ X 2 is 3rd hottest.This part is utilized in hot tubs to plumb a heater tube to a heater union.
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3 1/4″ Outdoor Diameter
2 1/4″ Inside Diameter, Gasket Rib Size 2 1/2″
Fits So much 15″ Spa Heater Unions
Kit of (2) Split Nuts & Gaskets