Material: MACHINED Aluminum Color: Black Straightness Factor +/-: Weight Tolerance +/-: Mechanical: N Fixed: N Grain: Length: Diameter: 1 5/8" Other FEATURES: Single Pin Adjustable Sight, Armour Pin Technology,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,2 Of .019 Fiber Optic,Will Not Accept Light Or Lens Kit