True 5:1 concentration. 1  Double the strength of other brands. 2  Minimal or no fillers and binders. 3  No pharmaceuticals, sugar, or dyes. 4  Comprehensive lab testing (e.g., heavy metals,etc.) 5  Made in a cGMP certified facility. 6  Unbeatable value. 7  Safely used in the USA since 1995.
Arrow Length - refers to the length of the arrow shaft. Arrow size - refers to the spine (stiffness) of the arrow. The shaft size is always referring to the diameter of the shaft, the wall thickness of the shaft and the distance that the arrow shaft will flex before it bends or breaks.
Spine was established in modern times by Easton who uses a 29 arrow. You place this arrow on two posts measured out 28 apart. You then place a 1.94 pound weight in the middle of the shaft and measure how far the arrow shaft drops down. This gives you a static (non-moving) spine. When an arrow is launched from a bow, the arrow flexes (dynamic spine).