Micro diameter arrow constructed of high modulus 100 percent carbon fiber for maximum speed and penetration with less wind deflection. Sorted to 0.5 of grain weight per dozen. Straightness Tolerance of .001 Inch. 350 (7.8 gpi.) 400 (7.1 gpi), 450 (6.7 gpi), 500 (6.0 gpi). Bohning F nocks included.