Description: Drill 4 pieces High-intensity quartz fiber post has a special drill to make an exact match with the fiber resin post Material：Quartz Colors ：Transparent Diameter/Length: Pink Ring:Diameter:1.0mm,Length:17mm Black Ring:Diameter: 1.2mm,Length:17mm. Yellow Ring: Diameter:1.4mm,Length:18mm Blue Ring: Diameter:1.6mm,Length:18mm Package: 20 pcs with 4 drills/Box.