GPP30" Replaceable Aluminum Arrow 2216 350SP Plastic Feather for 50-70lbs Compound Bow 12PC Shaft Material: 7001 T6 aluminum Defliction: 350 SP Size No.: 2216 OD: 0.346 inches / 8.8 mm&lt;br&gt; Arrows for 50 - 70 lbs compound bow.