Description: 100 Pieces dart shaft O-rings, and 30 pcs dart shafts Prevent shafts coming loose from the bodies of darts For securing and tightening dart stems easily and efficiently No need to worry about tightening your shafts before every throw Dart Shafts are Lightweight and durable aluminum construction, Super slotted for easy fit Solid metal sheen, shining and tasteful, specified for better balance, perfect replacement for your old worn ones Specification: O-Rings Material: Rubber Size (Outer Diameter x Inner Diameter x H) : Approx. 4 x 2 x 1 mm/0.16 x 0.08 x 0.04 inches Dart Shafts Material: Aluminum Alloy Length: Approx. 53mm / 2 inch Thread Diameter: Approx. 4.5mm Package Includes: 100 Pieces Dart Shaft O-Rings 30 pieces Dart Shafts Note: Since the size above is measured by hand, the size of the actual item you received could be slightly different from the size above. Meanwhile, please be reminded that due to lighting effects, monitors brightness/contrast settings etc, there could be some slight differences in the color of the pictures and the actual item.