Altra Phantom Premier Arrows 350 6 pk. Micro diameter carbon construction;Straightness tolerance: .001 inches;Premium aluminum, titanium, and stainless components;Length: 32 inches;Weight matched to +/- 1 grain;Includes Phantom A.R.C.O.S. Insert/Outsert System and nocks;Spine sizes: 250 (9.8gpi), 300 (8.5gpi), 350 (8.0gpi), 400 (7.1gpi), 500 (6.2gpi)table.productattributes, .productattributes td { border-bottom: 1px solid #ddd; border-collapse: collapse; padding: 2px; text-align: left; } Item Category Code: 1000 Product Group Code: 1000A Product Sub Group 1: 1000A1 Product Sub Group 2: 1000A1B Pack Size: 6 Inactive: No