Alpen Optics KODIAK 4-12x40 One Piece 1" Aluminum Tube, Waterproof Fogproof, Multi coated, Wide Angle, Riflescope TECHNOLOGY - Zero-set low profile windage and elevation adjustments with 1/4 MOA click finger adjustments for supurb accuracy with Alpen AccuPlex tapered reticle, generous eye relief and fast focus eyepiece. CONSTRUCTION - Shockproof and O-ring sealed and nitrogen filled for waterproof and fog proof security LENS COATINGS - Multi-Coated lenses for maximum light transmission CONVENIENCE - Alpen hard coat, black matte, non-reflective finish, Wide angle field of view for fast target acquisition. Mounting Length: 5.4", Total Length 13.4". Includes lens covers and cleaning cloth GUARANTEE - Alpens No-Fault, No-Problem Lifetime Warranty. If for any reason whatsoever if you have a problem with your Alpen product just return it to Alpen and it will be repaired or replaced and returned to you free of charge.