Description The Altra Arrows 166 Phantom Premier Arrows are precision-built micro-diameter arrows designed for bowhunters who need consistent performance right out of the box. Known for their shaft-to-shaft consistency, Altra takes accuracy even further with NO SPINE Technology for unmatched tunability and repeatable shootability. The Phantom 166 lineup features an upgraded A.R.C.O.S. outsert system for a stronger, cleaner, and more durable front end, while the lighter GPI carbon construction allows for higher FOC, flatter trajectory, and harder-hitting performance at longer ranges. With a micro-diameter profile to reduce wind drift, Pinnacle vanes for broadhead control, Nexum nocks for improved durability, and weight-matched consistency, these arrows are built for serious hunters looking to maximize accuracy and impact. Specs Grains Per Inch 250 - 9.8300 - 8.5340 - 8.0400 - 7.1 Factory Length 32" Components Included Phantom A.R.C.O.S. Insert/Outsert system and nocks Manufacturer Warranty Limited