The glass fiber will prevent the post from breaking and make it very resilient and it will not like a hard and numb metal post transmit stress and shock to the dentine. It will work together with the dentine to absorb any stress or shock as it has about the same elasticity as the dentine itself. This glass fiber is radio-opaque, allowing fast recognition on the X-ray. Pack contains: - 6 Pcs * #1. - 6 Pcs * #2. - 6 Pcs * #3. **For further product information, please contact Chat Support**