Easton 6.5 Bowhunter 250 spine Carbon Shafts - 12 pack - Enjoy improved accuracy and Easton quality. Easton 6.5mm Bowhunter carbon shafts are made with their proprietary Acu-Carbon uniform spine process. Features a non-glare, smooth black matte finish. Inside diameter of .246in for use with a huge amount of arrow components. High-strength USA made ACU-Carbon Pre-Installed Microlite nocks 6.5 Inserts (23 grains) with 4x more protective shoulder and added F.O.C. Straightness: +/- 0.006in