Altra Arrows Centrum 27 Limited Shafts AA110300. Each shaft boasts a straightness specification of up to 0.003 inches verified with state-of-the-art measuring equipment. The weight-matching process ensures that every arrow is within +/- 1 grain providing the most consistent performance available. These shafts are designed to help archers reach the pinnacle of precision and performance. Specifications for Altra Arrows Centrum 27 Limited Shafts AA110300: Manufacturer: Altra Arrows Color: Black Size: 300 Features of Altra Arrows Centrum 27 Limited Shafts: High-grade carbon shafts Straightness spec: Up to 0.003 inches NO SPINE Technology for improved tunability and consistency State-of-the-art measuring equipment for straightness verification Weight matched to +/- 1 grain 32" total length Comes in 12 pk shafts Components not included Package Contents: Altra Arrows Centrum 27 Limited Shafts