Gold Tip Nitro 22 inch Crossbow Shafts - 12 Pack - The Nitro is a heavy hitter, designed for today's fastest and most powerful crossbows. Recommended for draw weights over 175 pounds, or bows that require a 500 grain weight-range bolt. Features Gold Tip's legendary 100% Carbon Technology for unmatched durability and straightness retention. Features Length: 22in Straightness tolerance: +/-.005 Weight Tolerance: +/- 2 GR Weight 486 GR - 518 GR* when used with 100 GR Field Point 13.9 GPI