Carbon Express 50752 Maxima RED Carbon Arrow Shaft with Dynamic Spine Control Size 350 12-Packbr Bare shafts come with LAUNCHPAD Precision Nocks and BullDog Nock Collars br Hi-tech carbon material construction manages dynamic spine in a new way to make broadheads fly better and shoot more consistently br Laser checked for straightness to a remarkable 110000 of an inch Straightness of - 00025-inches is a maximum measurement not an average br Item specifications 350-size 907-GPI 0342-inch Spine and 0300-inch Diameter br 12-pack of red and black finished shafts are sorted and matched by weight and spine for best-in-class consistency