If you have a larger stem that the BJ Long bits won't fit on, these are what you need then! Perfect for making that clenching more comfortable.
Model: Soft Rubber Pipe Bits
Length: 0.72 in. / 18.33 mm.
Width: 0.52 in. / 13.41 mm.
I was a skeptic but after using them I am hooked these are very comfortable and making my pipe smoking a pleasure.