NOS Rust Resistor Can #4318006 Dates from the late 1980s and are empty but have not been opened. Pull tabs still there but they leaked out as in "they took a leak". Have two 5.00 each Have 2 that are full also. 8.00 each These may be good on waffles or for a sore throat but I would ask a doctor first. "Keep out of reach of children" may apply to clueless adults also For "efficiency" seems rather lame I have loads more cans of helpful Mopar additives, supplements, oils, etc. dating from the 1930s to the 1990s shipping extra PM me for info or irrelevant questions about my life as a newt.