Tricharger is the ONLY multimodulus nickel titanium wire that is MARTENSITIC in the anterior region and AUSTENITIC in the posterior region. Tricharger starts with a gentle 80-100gr in the anterior section to 300gr in the posterior without fading. The precise transformation of temperature makes delivery of precise and consistent forces possible from lighter-rooted anteriors to larger rooted posteriors. These three forces combine to provide optimum force levels and move the teeth effectively. Tricharger comes in Natural or an anatomically correct Ovoid shape that is recommended for self-ligating systems. If you don't see your sizes please send us an email. Try it and if it is not the BEST wire you have used it is FREE! Can your supplier do that?