Would like to know age of this set and any info you might know of. The antifreeze purger has two seperate glass cylinders that sit ont top of a cabinet and have heating coils in each cylinder. The oil changer/checker/flusher has one glass cylinder and drained oil thru the dipstick of a engine. The company name is CHOLDUN MFG. CORP. of New Haven, Conn. Email is> lor57@yahoo.com Thanks