The Muncie Back-Up Ring, part number 60V-2681-378 or 60V2681378, is a genuine Muncie PTO replacement component. Back-up rings serve a sealing-support function in PTO assemblies, preventing seal extrusion under pressure cycling. This part is sold by Pro Gear and Transmission. If you need help confirming this is the correct ring for your specific Muncie PTO unit, give us a call before ordering.FeaturesGenuine Muncie replacement back-up ringPart number 60V-2681-378 or 60V2681378Designed to support sealing components in Muncie PTO assembliesSold by Pro Gear and Transmission