Here are 88 New Vibraphone Rubber Post Insulators and 22' feet of bar cord. This is enough for a 3 octave vibraphone. Insulators are 3/4" tall and go around U- shaped posts that suspend bar cord on vibraphones. Over time rubber insulators on mallet instruments break down and no longer protect the bars from bumping into the posts that suspend the bar cord. The cord also wears down over time and is needed to suspend the bars for proper ring.