ADC PSX-20 Cartridge ADC RPSX-20 Needle ADC SER-II, SER-11, SER II, SER 11 Cartridge PSX-A PSX-5E PSX-10 PSX-20 PSX-30 PSX-40 SER-I, SER-1, SER I, SER 1 SER-II, SER-11, SER II, SER 11 SER-III, SER-111, SER III, SER 111 ADC SER-IV, SER-1V, SER IV, S

ADC PSX-20 Cartridge ADC RPSX-20 Needle ADC SER-II, SER-11, SER II, SER 11 Cartridge PSX-A PSX-5E (elliptical, good) PSX-10 (conical, entry level) PSX-20 (elliptical, better) PSX-30 (elliptical, a lot better) PSX-40 (elliptical, top of the line) SER-I, SER-1, SER I, SER 1 SER-II, SER-11, SER II, SER 11 SER-III, SER-111, SER III, SER 111 ADC SER-IV, SER-1V, SER IV, SER 1V