Replaces Audio Technica needles: ATN3400, ATN3401, ATN3410, ATN3450, ATN3451. Used in cartridges: AT3400, AT3410, AT3450, AT93. Diamond Tip. Speeds: 33 & 45 RPM. Tip Radius: .0007. Made in Switzerland. Tracking Force: 2 to 4 grams. Pfanstiehl has been in the turntable needle business for over 90 years - longer than anyone else! PLEASE NOTE: Make sure the needle that you are buying looks exactly like the one you are replacing, if the cartridge has been changed, the stylus may not fit. If you are unsure, please don't purchase.