Ayex AF Automatic macro extension rings for Canon EOS 5D Mark II, 5D Mark II, 60D, 50D, 50D, 600D, 550D, 500D, 450D, 1100D, 1000D for EF / EF-S (Electronics)
The rings looked a little different, as shown on the product photo. Mechanically, the rings properly processed, the sliding surfaces are made of metal, the body made of plastic. The bayonet segments are made of plastic, but there is the Gleitfäche ab