Pentair 271148 2-Inch Diverter Gasket Replacement Pool and Spa Multiport Valve

Can this be returned?

Is this an oem part made by pentair or is it a generic gasket

Will this work on my 2 inch 27-3208 Purex triton multi-port value? If not, what gasket do I need please?

Does this fit pentair sm-20-2 multi port? (only answer if you do know the answer please)