Altra 166 Outsert Titanium 350 Spine 1 dz. Fits Altra Arrows 166 Shafts;Machined from 7075-T6 aluminum for unmatched durability;Secure insert depth: 0.875 inches;Outsert encapsulates arrow end: 0.43 inches;Pre-installed rubber O-rings reduce vibration and improve concentricity;Comes in 12 pk QTY;Available in four sizes: 250, 300, 350, & 400 spine;50gn Total Weight;Accepts micro FMS insert weights;Enhances downrange accuracy and precision
