Pfanstiehl Replacement Diamond Stylus Needle for TETRAD 53D, 53S, 63D, 63S, A3, B3, C3, T5HD; M853-DS77 Used in TETRAD; Airline 60-13, EV5124 High quality Pfanstiehl needle manufactured in the U.S.A. Tip Material: Diamond and synthetic sapphire Tip radius: .0007 x .0007 Speeds: 16, 33 & 45 RPM