Best-selling Black 31" Fiberglass Targeting Practice Arrows with Replacement Screw-In Points for Recurve and Traditional Bow-12Pack One Dozen High quality fiberglass standard target practice arrows for recurve, compound, or long bows Shaft diameter:0.8cm/5/16". 31 inch arrows fletching with 2 green 1 black 3'' TPU vanes feathers Broadheads:100 grain nickel-plated stainless steel bullet tip perfect for target practice & beginers. Spine: 500. For draw weight of up to 50 pounds bows. Nocks are glued, can not adjustable Have good performance,low hand shock with good speed.Extraordinary durability for extended use.