Altra Arrows 25 Centrum Limited .001 Arrow Shafts 350 Spine Set of 12 Black. Crafted from high-grade carbon with a proprietary blend of high-modulus materials these shafts feature Altra's NO SPINE Technology for unmatched tunability and consistency. With an industry-leading straightness of .001 inches each shaft is meticulously verified using state-of-the-art measuring equipment. The weight-matching process ensures every arrow is within +/- 1 grain providing optimal consistency. These 32-inch shafts come in packs of 12 and are complemented by premium aluminum and stainless steel components making them the ultimate choice for achieving the pinnacle of precision and performance. Specifications for Altra Arrows 25 Centrum Limited .001 Arrow Shafts: Manufacturer: Altra Arrows Color: Black Length: 32 in Straightness: 0.001 in Fabric/Material: Carbon Features of Altra Arrows 25 Centrum Limited .001 Arrow Shafts Engineered with high-grade carbon for unmatched accuracy and efficiency. Straightness tolerance up to 0.003in verified by advanced measuring equipment. NO SPINE Technology for enhanced tunability and consistency. Proprietary high modulus carbon construction for superior durability. Premium-grade aluminum and stainless steel components. Package Contents: Altra Arrows 25 Centrum Limited .001 Arrow Shafts Altra Arrows AA-025P350B: 25 Centrum Limited .001 Arrow Shafts 350 Spine Set of 12 Black