Complete Drager Oxy K Pro Supreme Respirator Protective Gear Kit Gas Mask Rescue. The mask and 2 filters are unused. The Dräger Oxy® K Pro is a Self-Contained Self Rescuer, which operates independently of the ambient air. This Dräger Self Rescuer is designed for inspections, switching and control works to prevent and reduce damages in hazardous areas. Check out my other items, you might be interested. Good prices and discounts.