FEATURES: - 10 year warranty, extendable to 30 years and transferable according to registration. - Waterproof. - Tube 30mm Aluminum Alloy. - Fill with Nitrogen. - Red dot. - Weight 492 g MeoLux - Our newest and highest performance patented ion assisted multi-coating in the MeoStar® R2 series displays. This next-generation multi-lens coating delivers industry-leading light transmission of 99.8% per lens surface while suppressing reflections and glare. MeoLux multi-coated displays offer the industry's highest absolute transmission speeds. MeoShield - MeoShield ™ ionization-assisted coating protects the outer surfaces of lenses and offers greater resistance to scraping or abrasion under extreme conditions. MeoShieldTM meets military specifications for durability and surface hardness. MeoDrop - A patented hydrophobic lens coating designed to repel water, grease, skin oils and contaminants on the surface of the lens that can impair clarity. This microscopic hydrophobic layer - applied to all surfaces of external lenses - repels water so that rain and moisture become a solid ball and simply roll off the surface of the lens. MeoDrop coated lenses are easily cleaned without blemishes, stay clean longer and maintain the highest level of visual clarity, ensuring that the outside environment will have no effect on your ability to select a lens either under rain, snow Or any other element that Mother Nature can throw toward you.