Great Taper: Sizes & Codes

GT instruments are produced in three sizes, 20, 30, and 40, and each size comes in four tapers: 10, 08, 06 and 04. The size of the instrument is shown by the colour band, and the taper is indicated by the number of taper rings.

In addition, three bigger instruments are included in the GT family; sizes 35, 50 and 70, all with a taper 12, for preparation of very large canals and for coronal flare in other canals.