Carbon Express X-Buster Arrow Shafts 500 1 doz. Built for indoor tournaments at 20 yards and 18 meters;Conforms to 9.3mm FITA and NAA rules;Heavy construction for slower, more forgiving indoor speeds;Designed to provide proper spine at the correct weight;Straightness:+/-0.0025 inch;Average straightness:+/-0.001 inch;Weight tolerance:+/-1.0 grains;Includes 12 Bulldog nock collars, other components sold separatelytable.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 1000 Product Group Code: 1000B Product Sub Group 1: 1000B1 Pack Size: 12 Inactive: No