Caliburn Players Darts – Steel Tip – 90% Tungsten – Sandro – 21g. Each pack contains 90% tungsten barrels fitted with Caliburn replaceable points, stems and flights. Thread: 2ba Supplied fitted with the Caliburn Replaceable Point System.Caliburn Players Darts – Steel Tip – 90% Tungsten – Sandro – 23g. Each pack contains 90% tungsten barrels fitted with Caliburn replaceable points, stems and flights. Thread: 2ba