Key features: Durable, 100% carbon construction. Low grains per inch allows for improved front of centre tune and the flattest trajectory. Small diameter ideal for long range shooting. Wide range of spines available. Also available as fletched shafts. See alternative items below. Technical specifications: Material: Carbon Diameter: 15/64" Grains Per Inch: 8.6 (400 spine) Straightness Tolerance: ± .001" Weight Tolerance: ± 1 grain Available Spines: 300-900 Uncut length (approx): 32" Included components: Micro nocks Optimal for: Long range target shooting. Field and WA/ FITA Outdoor.