The brown plastic dome resonators were proprietary to Selmer Paris horns until they became available to techs aftermarket. As a result, most Super 20's and Zephyrs had either flat metal or simple rivet resonator pads. The type of resonator you decide to go with in a re-pad is entirely up to you, however one prerequisite is that you use a thinner pad (around .160), as Kings, Martins and Conns all require the thinner pads to seat and seal properly.

Hi, I also have a King super 20 silversonic tenor and i will go for flat metal resonators when it needs a re-pad. As for the mouthpiece i have a Dukoff miami florida D9. I had a link 7 for a while but i find the Dukoff is loads better for me.