GPP Archery Carbon 30-Inch Targeting/Hunting Arrows Field Points Replaceable Tips (12 Pack) Recuve Bow & Compound Bow 12Pack of 30 inches arrows with strong, lightweight carbon shafts; improved wall thickness for added durability matched with replacement field points; optimal accuracy and target penetration,and nocks Colored plastic fletching & nock rounded permanent nickel-plated stainless steel tip perfect for target practice & outdoor shooting Diameter:7.8mm.For draw weight 40-60 pounds bows Nocks are not fixed by glue. They can be adjusted for your bow.