The lighted XX75 20" 2219 aluminum arrow is fletched slightly offset and is fitted with a 13-grain aluminum insert, 2 Easton Bully boattail vanes, and TenPoint s green molded Alpha-Nock and Alpha-Brite system. Nock: Alpha-Nock Straightness: .003" Grain Weight Tolerance: +/- 2-grains per dozen Weight: 435-grains F.O.C.: 9% Vane: 2" Easton Bully Boattail Vanes Features: Green molded Alpha-Nock and Alpha-Brite system Inside Diameter: .305 Quantity: 3 Arrows For Crossbows