Quill Carbon Arrows are specifically designed for use with Excalibur’s TwinStrike and Micro Series crossbows. 16.5″ Arrow Length 250 Grain Arrow weight .003 straightness tolerance 2″ Blazer vane with a 3 degree offset Equipped with Rhino Nocks Compatible CeaseFire Technology crossbows or any that utilize flat-back nocks PRODUCT CODE: 22QV16-6