Here are some basic parts for Bach trumpets. Info and photos will arrive at some point. In the mean time, we found a helpful review of Bach valve felts on Amazon:
so felty, so washery!
These are the feltiest, washeriest felt washers I've ever seen..
My Valve Stems have never known soft felt luxury like this before, and it shows. Before I got these, my valve stems where just phoning it in, but now they're like BAM! I'm a valve stem baby!