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.
Nocks, shafts, and arrows are generally measured by grain; a British unit based on the weight of a seed of barley. One grain is equal to 64.8 milligrams, or about 1/15th of a gram. Nocks commonly weigh from under 6 grains to over 20, or even higher for pin nock systems.