PREMIUM 100% CARBON, the Extreme-carbon fiber supply the good toughness for the arrow. CHECKED 100% with perfect Laser STRAIGHTNESS, also they are equally SPINE and WEIGHT CHECKED for CONSISTENCY. Made by high strength carbon fiber ensure a durable,straight and consistent projectile.Suit for 150-175 lbs crossbow. Item specifications:Spine 56/GPI 9.0/Straightness ±.006/ID .300/OD .346, come with Brass inserts,Half-moon nocks and fletched with Q2i FUSION X-?¡ 3" Vanes
