Caliburn Crane Darts – Soft Tip – 90% – Natural – 18g. This Caliburn Crane Soft Tip Dart features a 90% straight tungsten barrel, with a ringed section along the full length of the dart. The natural finish on the barrel enhances the visual appeal of the dart. They come complete with Caliburn Dart Shafts and Flights.Caliburn Crane Darts – Soft Tip – 90% – Natural – 20g. This Caliburn Crane Soft Tip Dart features a 90% straight tungsten barrel, with a ringed section along the full length of the dart. The natural finish on the barrel enhances the visual appeal of the dart. They come complete with Caliburn Dart Shafts and Flights.