The Dot Line 49-72mm Step-Up Ring is a high-quality accessory that allows photographers to adapt a lens with a 49mm filter thread to accept filters or other attachments with a 72mm thread size. Made of durable aluminum, this step-up ring ensures a secure and precise fit for seamless compatibility. This product is designed for photographers looking to expand their lens filter options without having to purchase multiple filters for different lenses. The Dot Line 49-72mm Step-Up Ring is a versatile and reliable solution for achieving the desired filter effects on a variety of lenses in the Step up Rings category.