Dart weight: 17g.Dart barrel weight: 15g.Dart barrel diameter: 8.5mm.Material:Iron, aluminum alloy, pvc.Great for the Player Who Wants to Experience and Find Out What Works Best for Them, Ideal Gift for Beginners and Any Level Darts Players,Nice Choice for Dart Bar /Pub and Home Use.3 Pcs flexible integrated ROST dart flight can be away from ripped out,always stay at perfect 90 degree for dart games,make darts fly stably,improve darts accuracy.Stengthen screw thread is stiff ,connect the barrel tightly,offer superior durablity and strength in darts game.Ideal professional dart set for darts players in any darts tournament,super gift for friends or family.