Trophy Ridge Alpha 1 is made of 100% aluminum construction which means the Alpha 1 is as rugged as it is precise. Add to that 14 inches of .019 fiber, and you've got a bullet-proof sight that's dead simple. Contrast glo ring with spectral distribution technology helps you effortlessly align the peep to the sight ring. No snag fiber routing system individual fiber channel keeps fiber out of harms way. Sight level with third axis adjustability. The front clear fiber optic ring soaks up all available light to product the brightest pins Trophy Ridge has ever offered. Sight Light Housing accepts the exclusive Trophy Ridge Rheostat Sight Light and channels the light through the fiber optics - exposing your pins instead of your position.