Glass fiber, plastic pattern or stainless steel posts. C-I™ White Posts give you strength, esthetics and significantly enhanced radiopacity. C-I™ Plastic Pattern Posts are easily used for direct or indirect techniques. C-I™ Stainless Steel Posts provide maximum strength for amalgam or composite cores. All posts in the C-I™ System use the same calibrated C-I™ Drills for quick and easy placement. B Fine Drill (for use with All FINE posts: S090, S091, S100, S105, S106, S120, and S125).