Nexxus Infinity Shafts 12 Pack Black 400. These 4.2mm/.166 ID micro diameter shafts are paired with the Defender outsert system providing increased penetration and durability for your arrow setup. This micro diameter shaft has less wind drift in flight resulting in improved accuracy when compared to standard diameter shafts. Specifications for Nexxus Infinity Shafts: Manufacturer: Nexxus Color: Black Quantity: 12 Size: 400 Features of Nexxus Infinity Shafts: Defender Aluminum outsert system increases penetration and durability Micro shaft has less wind drift for improved accuracy compared to SD shafts 5.9mm OD 4.2mm/ .166 ID Includes alloy outserts Package Contents: Nexxus Infinity Shafts Nexxus Infinity Shafts