Kits include: 24 posts, 6 each of 4 different sizes; ø1.10, ø1.25, ø1.40, ø1.55 mm corresponding to post sizes L1, L2, L3, L4, and 4 corresponding reamers CF Carbon Fiber and GF Glass Fiber Posts consist of strong fiber bundles braided in a multi-axial arrangement. Both posts are non-corrosive, biocompatible and offer superior resistance to bending and torsion forces. GF Glass Fiber posts are an ideal cosmetic choice as they do not show through dentin. Glass fiber is the perfect material to obtain the advantages of carbon fiber, combined with superior esthetic results. CF Carbon Fiber and GF Glass Fiber Posts are virtually unbreakable. Their elasticity is similar to dentin, enabling the posts to flex with the natural dentin. These posts dissipate occlusal stress and do not transmit it as metal posts do. Both posts are composed of a fiber reinforced, epoxy resin with the reinforcing fibers in the form of a braided plait. This braided, multi-axial arrangement of fibers provides superior resistance to bending and torsion forces compared to fibers in an ordinary axially parallel arrangement. Fiber content of both posts is approximately 65%. They also offer passive retention slots instead of active cutting threads.