Unicorn John Lowe Phase 4 Steel Tip Darts - 21gmClassic design meets modern precision engineering with the Unicorn World Champion Ambassador John Lowe Phase 4 Dart. Created in collaboration with the legendary three time World Champion, the revamped 90% tungsten barrel is fine tuned to deliver Johns unerring accuracy and controlled playing style that saw him dominate the sport. Updates include a centrally positioned milled micro block to provide more grip and an enhanced feel for improved control.