The product is a set of screw-in Leica Leitz extension tubes in 60mm and 90mm lengths, made in Germany. Specifically designed for Leica lenses, these extension tubes allow for closer focusing and the ability to achieve a larger magnification. The tubes are secured in place with a screw-in fastening mechanism, making it easy to attach and remove them from the lens front. These high-quality extension tubes are a valuable addition to any photographer's gear, especially for those working with Leica L lenses.