Lightweight cartridge conversion kit with Pfanstiehl Model P51-3 (3 mil) cartridge for us in pre 1100 Wurlitzer Models playing original 78RPM records. Now with new bracket, bakelite plug and more flexible wire. This kit features a 3 mil needle that is ideal for original shellac 78 rpm records. 3 mil will rip up your reproduction vinyl records, if your running reproduction vinyl get a 2 mil or p51-2 kit.