Altra Arrows Non Micro Insert Weight 50 grains Silver. O.C. and improve down range accuracy. The non-micro insert weights are designed for use with all Altra arrows larger than 166 and are stackable for infinite weight adjustment. Specifications for Altra Arrows Non Micro Insert Weight: Manufacturer: Altra Arrows Color: Silver Features of Altra Arrows Non Micro Insert Weight: Comes in 12 pk QTY Available in 10 20 & 50 Grains Blue Loctite recommended for assembly Package Contents: Altra Arrows Non Micro Insert Weight Altra Arrows AA-AC-00012: Non Micro Insert Weight 50 grains Silver