Posch Archery 30'' Carbon Practice Arrows (Field Tip) - 12 Pack These arrow are for archery practice as substitutes for high-end arrows. Here is the comparison Pros: Enhanced durability, improved consistency and reduced weight for better performance. Cons: Reduced straightness tolerance, simplified carbon-fiber weaving process. Don't use on a overly powerful bow. Suitable for mid poundage bows up to 60 lbs. Standard field arrowhead. Weighs 440 Gr. Shaft measures 30", Spine 550, Straightness +/- 0.01. Nocked compound bows style.