FEATURES-Sight in at 20 & 60 yards and you're dialed in from 20 to 80,in 5 yard increments-Tool-free adjustments-Fully protected fiber optics-Sight Housing: 1 5/8"-Fiber Length:2 ft.-Pin Size: .019PRODUCT SPECIFICATIONS:Dimension 2.30 X 5.30 X 8.05Height 2.3000Width 5.3000Length 8.0500MATERIAL MACHINED ALUMINUMCOLOR BLACKTYPE SIGHTSMECHANICAL NFIXED NDIAMETER 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 WEIGHS 8OZ,1 5/8" HOUSING,2' OF .019 FIBER OPTIC,WILL NOT ACCEPT LIGHT OR LENS KIT