Predator Air 5mm arrows are designed to balance speed, durability, and consistent accuracy in practical bowhunting conditions. The 5mm shaft diameter supports efficient flight and reliable penetration, while 360-degree spine consistency helps maintain predictable shaft behavior for straightforward, repeatable tuning. Straightness is held to +/- 0.025 inch max with an average straightness of +/- 0.002 inch, and weight tolerance is +/- 2.0 grains. Components: 5mm aluminum sleeved two-piece 40-grain inserts.