[DURABLE MATERIAL] Made of aluminum alloy material, ensuring solid construction and long-lasting use. [WIDE COMPATIBILITY] Transform caliber adapter ring enables different diameter lenses to share the same filters, hoods, and accessories. [VERSATILE USE] Compatible with a variety of same caliber filters including UV, CPL, starlight mirror, and close-up lens hood. [EASY INSTALLATION] Lightweight and portable design makes it easy to install and use on your lens. [CONVERSION RINGS] Small turn-up conversion caliber rings included for convenient adaptation to different lens sizes.