"A smooth-flying small-diameter design that delivers extreme FOC and kinetic energy, our BlackOut SX3 Hunter Small Diameter Carbon Arrows deliver extreme accuracy, speed, and penetration. Offering a great combination of accuracy, toughness, and impact energy, the SX3's small diameter delivers tremendous speed and penetration with less wind deflection for extreme accuracy and long range performance bowhunters will love. Each SX3 comes equipped with an advanced 60-grain stainless steel insert for trustworthy durability, increased F.O.C., and reliable penetration. Made of an intermediate-modulus carbon fiber, each arrow features a spine aligned to the stiff axis and is weight matched to 0.5 grains for consistent tight groups. Fletched with 2"" vanes. Straightness tolerance: .003"". Weight tolerance: .5 grains. I.D.: .204"" Precise and powerful small diameter hunting arrow Great combination of performance, toughness, and impact energy for bowhunters Tough intermediate-modulus carbon fiber construction Small diameter design - great arrow speed and penetration with less wind drift Advanced 60-grain stainless steel insert high F.O.C. - greater energy at impactView the BlackOut SX3 Hunter Small Diameter Carbon Arrows Spine Chart"