Gold Tip Nitro Pro Bolts 22 in. Moon 3.5 in. Vanes 6pk.. Recommended for draw weights over 175 pounds or crossbows that require a 500 grain weight-range bolt. Features Gold Tip's Smart Carbon Technology for unmatched durability and straightness retention. Specifications for Gold Tip Nitro Pro Bolts: Manufacturer: Gold Tip Length: 22 in Included Accessories: Standard Fletching: 3.5 in Vanes Archery Application: Hunting Features of Gold Tip Nitro Pro Bolts: GPI 13.9 Length: 22" (Inserts loose for cutting down) Straightness Tolerance: +/- .1" Outer Diameter: .347" Inner Diameter: .272" Package Contents: Gold Tip Nitro Pro Bolts Aluminum Flat or Moon Nock 6 gr Brass insert Pro version of the Nitro bolt features a straightness tolerance of +-.001 and weight tolerance of +-.05 grains. Shafts weigh 13.9 GPI. Available in 22 length only. Includes aluminum nocks and brass inserts (loose). Factory fletched with 3.5 in. vanes. Finished weight of 514 gr. with 100 gr. point.