Audio Technica AT21, 635d7, replacement stylus. Has conical diamond tip. Tracking force: 1-1.5grams. Stylus assembly out of the front of the body of the cartridge. Colors were gray or green or black. Also used as: CEC MC7; Coral MC7; Denon DSN15;Onkyo DN15; Pioneer AT21; Sansui ST9D,SN24; Sharp N17D; Yamaha N5000 (some);Toshiba N12C,D;

Sansui APS 310, ST10D, Has .7mil conical diamond tip. Tracking force: 2-4grams. Stylus assembly pulls out of the front of the body of the cartridge. Color are white or red. Also used in Micro Seiki V207; Mitsubishi DMC6001, 6002; CEC 2; Coral CP300, CH 7000D, ST630;