I-sport 12 Pack Replaceable 31-inch Carbon Shaft Arrows 350 Spine W Plastics Fletching Screw-in Arrow Tips purple arrows Shaft Material:Mixed Carbon Arrows Length:31"(79cm) Colored plastic fletching & nock with a black shaft and tip It has good performance, low hand shock with good speed and unbeatable price. This carbon arrow is suitable for up to 55lbs compound bows or recurve bow,extraordinary durability for extended use