Replacement blade guide post to fit Marvel Series 8, 8MKII and 8MKIII bandsaws, along with Amada VT4555 and VT4555M machines. The solid carbide non-rotating guide post system on these vertical bandsaw machines allows the user to periodically rotate the blade guide position for maximum life of the post. Replace when there are little to no round surface areas to use. 4ea. used per machine. Alternate part number 8D901.