The KonusPro 550 takes the guess work out of hold over angles for even the most difficult of shots. The exclusive ballistic reticle coinciding with the most popular center fire loads today provides you with a system of reference lines for exact aiming points out to 550 yards. Lateral hash marks allow for precise leads of moving targets as well as compensating for strong crosswinds. The glass engraved ballistic reticle is unbreakable and the multi-coated optics are clear and bright. Waterproof Fogproof Shockproof Dry Nitrogen Filled Airgun Approved Heavy Caliber Recoil Proof Reticle Multi Coated Optics Engraved Reticle in the Second Focal Plane Includes Lens Caps and Lens Cleaning Cloth 1 Piece Tube Construction Finger Adjustable Windage and Elevation Adjustments