Diablo Illuminated Carbon Arrows are specifically designed and spine for use in Excalibur’s Matrix Series Crossbows and the speed they produce. 18″ Arrow Length 263 grain Arrow weight .003 straightness tolerance 2″ Blazer vane with a 3 degree offset Factory installed illuminated Beacon Nocks Compatible with CeaseFire Technology crossbows and all models that utilize flat nocks. PRODUCT CODE: 22DV18IL-3