Buchanan System B Heat Plugger Fine 0.04 Taper Individually Packaged Each Complements the contour of final root canal preparation. Eliminates stress on the root canal system. Does not oversoften gutta-percha. Instantly cools after heat disengagement. The definitive shape of the Buchanan System B Heat Pluggers matches them closely to the final root canal preparation. The unique shape prevents placing unnecessary stress on the root canal system by maximizing condensation forces.Using the System B heat source to maintain a precise temperature during the entire procedure, the Pluggers do not oversoften the gutta-percha that fills lateral canals during apical sealing. Instant cooling occurs when pluggers are removed from heat, resulting in easy separation of condensed gutta-percha.Buchanan System B Heat Pluggers work well with the elements Obturation Unit and the Traditional System Unit B.Each pack contains five pluggers; 1 of each #: Medium-Large, Medium, Fine Medium, Fine, Extra Fine.