250 Grain Arrow weight; .001" straightness tolerance; +/-1 grain weight tolerance; 2" Blazer Vanes with a 3-degree offset; High-Quality carbon fiber; Equipped with Rhino Nocks; White cresting for easy shot placement verification; Compatible CeaseFire Technology crossbows/any that utilize flat-back nocks; Excalibur's archery gear is known for its durability, versatility, and changeability; Available in 3 lengths: 16.5 inches, 18 inches, 20 inches