Easton’s Avance Sport 4MM arrows are an all-carbon target arrow intended to fit in the middle of the outdoor target archery market.The Avance Sport carries a +/- .006” straight spec.Ideal for novice level archers looking for lightweight performance in a less expensive arrow.The Avance series is available in a wide selection of spine sizes that cover tuning ranges for recurve and compound archers over a broad range of bow styles, draw lengths and poundages. The durable, all-carbon construction of the Avance nets an arrow that is lighter than previous Easton offerings.Spine: 660