Match up these Ravin Lighted Bolts with your Ravin Crossbow to maximize performance and ensure easier retrieval at night or in low-light conditions. A straightness factor of .001 defines reliability. The 100% carbon construction features high-impact brass threaded inserts and aluminum nock bushings, 2 high-profile offset vanes, high-impact aluminum nock bushings and polymer nocks. For use in Ravin crossbows only.Recommended field-point size:11/32. Inserts and nocks included. Per 3. Length: 20. Straightness factor: .001. Wt. tolerance: 4 gr. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Carbon Bolts.