The Sunpak St Up 52-72 Step Up Ring is a high-quality accessory designed to allow you to attach a 72mm filter or accessory to a lens with a 52mm thread. This step-up ring is made of durable materials to ensure a secure fit and reliable performance. It is ideal for photographers who want to expand their creative possibilities by using different filters or accessories on their lenses. The Sunpak St Up 52-72 step-up ring is a must-have tool for photographers looking to enhance their photography gear without having to invest in new lenses or filters.