The document describes several models of oxygen self-rescuers used in mining environments. It lists the main specifications of models K-S30, K-S40, K-S50, and K-S60, including protective duration, inhalation resistance, breathing temperature, dimensions, weight, period of validity, and includes pictures and operation manuals. The self-rescuers can generate oxygen quickly and reliably to protect miners, meet European safety standards, and have low breathing resistance and temperatures for comfort.