The Bacti-Cinerator IV sterilizes by infrared heat (Heater Element contains no asbestos) and prevents infectious spatter and/or cross contamination. Organic material is incinerated deep inside the ceramic tunnel. To use, simply insert loop or needle into the tunnel. Complete sterilization takes only 5 to 7 seconds at optimum sterilizing temperature of 1,500 degree F. There is no need to wait for the loops or needles to turn red. Unit does not require oxygen so it can be used in anaerobic chambers. Safeguard laboratory personnel with no open flame and no hazardous gas. UL approved.