BJ Long's Soft Live Rubber Pipe Bits (2-Pack)
Designed to prevent tooth marks and other stem damage, as well as to protect the teeth of hard clenchers, these rubber covers fit easily over a variety of vulcanite or acrylic mouthpieces. Many smokers prefer these covers for their easier grip and added comfort when clenching a pipe, especially while driving.
Pipe Nook Notes
While these rubber bits will fit over the vast majority of pipe stem ends, they are not guaranteed to fit all stems. They may not fit on very small or very large stems, but I've yet to find one they won't fit within the pipes that I carry here at The Pipe Nook.