Glass fiber, plastic pattern or stainless steel posts. Each post style is available in two sizes - Fine and Medium. 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.