Breakthrough Filters Breakthrough Photography Brass Step-Up Ring ステップアップリング (Step-Up Ring) 43mm to 46mm To create the most durable step-up ring, we simply combined craftsmanship, quality, and durability, and adapted it to a step-up ring. We manufacture this step-up ring from brass, which then withstands corrosion and other abrasive elements that frequently occur in outdoor photography. As a result of superior construction and materials, combined with a proven design, this step-up ring is the most robust and functional step-up ring available to professional outdoor photographers. Benefits: Made of brass for durability. Solid & Lightweight. 25-Year Support Features: CNC machined brass, matte black electroplated finish. Traction Frame. CNC Machined Brass Adapter Ring: We manufacture this step-up ring from brass, which then withstands corrosion and other abrasives that occur in outdoor photography. Compatibility: Compatible with all 43mm camera lenses and 46mm accessories. The lens thread size is printed under the lens cap or written somewhere on the lens barrel. If it doesn't fit your lens, please order the correct size. The Most Durable Step-Up Ring: As a result of superior construction and materials, with a proven design, this step-up ring is the most robust and functional step-up ring available to professional outdoor photographers. A lens cloth is also included free of charge. Exactly what you are looking for: The reach and application of this filter adapter ring is to provide proper traction and optimized performance. 25-Year Support: Our step-up adapter rings are made of high-quality brass and will last for over 25 years.