For dental use only. Straight /Screw surface. Screw : 1.2mm(Yellow) 1.4mm(Red) 1.6mm(Blue) 1.8mm(Black). Straight :1.0mm(Black) 1.2mm(Yellow) 1.4mm(Red) 1.6mm(Blue). The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies.
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