ANTSIR Outdoors Carbon 30-Inch 7.8mm Shaft Removable Arrows with Field Points Replaceable Tips for Recuve & Compound Bow(Pack of 12) Diameter:7.8mm.For draw weight under 40 pounds bows 12 Pack 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 Nocks are not fixed by glue,they can be adjusted for your bow.