Beman ICS Hunter Arrow Shaft w/ inserts and Super nocks -Beman's Internal Component System allows for easy nock adjustment and perfect alignment. Beman ICS Hunter Weight tolerance +/- 2 grains per dz. Black carbon mycro-smooth finish. SIZES: 500 - 7.3gpi, 400 - 8.4gpi, 340 - 9.3gpi, 300 - 9.5gpi