Warburton Top Part 3D for Trumpet

This is my bread and butter, everyday mouthpiece top which I use in the CBSO and for other work. It seems to give a combination of a warm, fat sound, while still letting the instrument resonate. I combine it with a 10* backbore which seems to do the trick, and then swap on to smaller cups when playing piccolo, natural trumpets or for more commercial, fizzier work.