A fast-installing fletching designed for use with the fastest bows in the world, New Archery Products Quickfletch Hellfire Vanes deliver quiet flight with top notch accuracy. Patented NAP vane technology stabilizes the arrow quicker for increased long-range accuracy. Designed to work with any bow or crossbow. 33 grains. Manufacturer model #: 60-333. Easy-to-use fletching designed for use with the fastest bows or crossbows Quiet flight with top notch accuracy Stabilizes arrow faster for increased long-range accuracy 33 grains