Designed specifically for Canon EF 75-300mm f/4-5.6 and EF-S 55-250mm f/4-5.6 III lenses with a 58mm filter thread. Ensures a secure, snug fit. Blocks stray light to minimize unwanted reflections, improving image contrast and color accuracy for sharper, clearer photos. Made from high-quality ABS plastic for long-lasting use without adding extra weight to your camera setup. Simple screw-on attachment with a secure lock. Reversible for compact storage when not in use. Helps shield the front element from accidental bumps, scratches, and dust, extending the life of your valuable lens.