Huntingdoor Archery 32" Carbon Arrows 400 Spine with 3 Inch Vanes Screw In Field Points 7.5mm Diameter for Recurve or Compound Bow Pack of 24 Arrow length: 32inch. Diameter:7.5mm. Spine: 400, Weight 25g Colored plastic fletching, screw in stainless steel tips, adjustable nocks Nocks can be rotated to suit for your bow. Extraordinary durability for extended use Matched with replacement field points; optimal accuracy and target penetration,and nocks 31 inch arrows with strong, lightweight carbon shafts; improved wall thickness for added durability