All these cartridges are interchangeable:Astatic 351, 351d <-- MUST USE needle 169 See belowArista 1890, 1890D <-- uses needle 510 see belowPfanstiehl P-145,P-145d <-- uses needle 510 see belowElectro Voice 239 <-- uses needle 510 see belowGE C650 <-- uses needle 510 see below