Excaliburs Diablo Illuminated 18 carbon bolt is designed specifically for use with Excaliburs bows with Compact Recurve Technology. With 2 vanes, a spined design and increased front-of-center weights, these crossbow bolts deliver blazing-hot speeds and unbelievable accuracy. The included Burt Coyote Lumenok illuminated inserts glow when accelerative force is placed on them in the shot cycle. They provide an illuminated path to your target plus improve arrow retrieval. Per 3. Length: 18. Overall wt.: 250 grains (without point). Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Color: Coyote. Type: Carbon Bolts.