This sale is for a really excellent condition genuine No. 1 80mm Lens Hood for use with any RB67 or RZ67 50mm or 65mm lens, or also with the original version Mamiya 645 45mm f2.8 C lens.
This hood collapses for storage on or off the lens. It has only normal very minor signs of use. Many photographers (including me) also use this hood with the Mamiya 645 35mm f3.5 C and N lenses as Mamiya did not produce a specific hood for these lenses.