ECL The Original, Mil Spec. CHRISTO-LUBE MCG 111, 2 oz. Tube High Performance PFPE Based Lubricant Oxygen Compatible Grease Meets the specification requirements and has been qualified under Military Specification MIL-PRF-27617F Types I, II and III Has been adopted as the preferred oxygen compatible or enriched air (Nitrox) lubricant by most breathing apparatus equipment manufacturers. Note: This is the Original Mil. Spec. Mfg. CHRISTO-LUBE MCG 111