Replaces the following needles: EV 3316DS, Tetrad 23D, 23S, 43D, 43S, 52D, T2MD, TT2MS, T3MD, T3MS, T20MD, T30MD, T30MS, Pfanstiehl M854-DS73. Used in the following Soundesign phonograph models: : Soundesign 422, 432, 435, 453, 1000, 2000, 2201, 2301, 3450, 2490, 3100, 3201, 3202, 3205, 3208, 3260, 3401, 3600, 4050, 4239, 4245, 549, 4260, 4280, 4245, 4268, 4450, 4580, 4518, 4520, 4544,4520, 4549, 4580, 4919, 4722, 4751, 4774, 4837, S4848, 4858, 5000, 5100, 5127, 5128, 5145, 5152, 5153, 5164,5345, 5503, 5345, 5499, 5510, S5503, 5499, 5510, 5513, 5525, 5532, 5537, 5540, 5564, 5586, 5590, 5601, 5614, 5627, 5635, S5757. Tip Material: Diamond & Synthetic Sapphire. Speeds: 16, 33, 45 RPM. Tip Radius: .0007 x .0007. Made in the USA