This is a upgraded drain plug for inside filter compartments. This is way better plug then what comes with tanks. Comes as 2 pack.
Please check your 3 way fitting below filter box to see if got threads on drain if got treads then this wont work you will need version 1 outer drain plug for the v2 inner plug. This was a change that was done in Jan. 2021 so if got new tank morel likely you will need treaded drain plug. if its been drill out then this plug will work.