Ultra-light, small .204" inside diameter profile with extreme FOC design Extremely durable high modulus carbon construction for ultimate durability Exclusive Dyna-Tek Slick Shield coating for deeper penetration and easier arrow removal from targets Smart Carbon Technology has no fillers and is 100% carbon The fastest most versatile long-range hunting arrow Straightness Tolerance: +/- .001" Weight Tolerance: +/- .5 grains GT accutough series nock, accutough insert, nock collar and ballistic collar included Weight: 400 (7.2 gpi), 340 (7.8 gpi), 300 (8.5 gpi)