Innovative 72mm WR Ceramic Protector Ultra Thin Clear Glass Lens Filter for superior lens protection Features revolutionary Clear Glass Ceramic material for unmatched toughness and durability Offers high transmittance ideal for optical glass, ensuring clear and crisp images Compatible with all Sigma lenses, allowing for versatile use across different camera models Equipped with water and oil repellent WR coating, minimizing flare and ghosting for optimal image quality Comes with a specially designed, durable storage case for extended filter lifespan