32-40 Tpi Partial Profile Guhring Un Thread I.D. Lh System 104 Insert, 17Mm Reach, Uncoated 32-40 Tpi, 17Mm Reach, Left Hand Gg104.Tu32.040.17.26.L, Uncoated Type Gg104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Partial Profile Inch Threads. Guhring Series No. 25179 Order Code 4.001 Made In Germany, Guhring Part #9251790040010 Guhring Inc.