Ceramic Tetrad replacement phonograph styli Model 11D, 11S, 31D, 31S. Used in Tetrad 1-11D, 2-11D, 2-11S, 3-11S, 3-11D, 6-11S, 6-11D, 5-31D, 6-31D MOT, 59C-62971A01, 63643aO1; Pilco 35-2876-1; 2; 2877, 78, VM37634, 36487. New old stock. Conical tip. S855-DS77