Excalibur developed the new Diablo carbon arrows, specifically designed for use in Excalibur&&';;s MATRIX Series Crossbows. The Diablo carbon arrows are 18" long and feature 2" vanes and they are spined for the blistering speeds you get with Excalibur&&';;s MATRIX crossbows. A heavier front insert increases front-of-center weight for unparalleled accuracy. 250 gr. Diablo arrows also feature a flatback insert which means no need for nocks which gives you much more reliable contact with the string. PRODUCT# 22DV18-6