K&F Concept 11pcs Metal Stepping Rings Step Up Ring Set 26-30MM 30-37MM 37-43MM 43-52MM 52-55MM 55-58MM 58-62MM 62-67MM 67-72MM 72-77MM 77-82MM Compatible with Canon Nikon DSLR Cameras Lens Kit Includes: Generic Metal 11pcs Step Up Ring (26-30MM,30-37MM,37-43MM,43-52MM,52-55MM,55-58MM,58-62MM,62-67MM,67-72MM,72-77MM,77-82MM) Compatible with the Canon, Nikon, Sigma, Tamron,Sony,Fuji Camera lens. Precision made from premium-grade aluminum,solid and light-weight. Great tightness, no wobbling or cross-threading. The first number is always the lens thread size, the second number is the filter size of the accessory. If the first number is smaller, it's a step-up.