Material: MACHINED Aluminum Color: Black Type: Sights Diameter: 1 5/8" Other FEATURES:: Single Pin Adjustable Sight, R.D.S. Technology PROVIDES Yardage Tape In 5 Yard INCREMENTS With Quick Turn Of The Dial Other FEATURES2:: Weighs 8Oz,1 5/8" Housing,3 Of .019 Fiber Optic,ACCEPTS Lens Kit B & Blue Burst Light