Quick view Douglas Products Douglas HTF Inhibited Propylene Glycol MSRP: ₩58,916 - ₩308,749 Douglas HTF Inhibited Propylene Glycol in 1 Gallon Containers Recommended for: Block Ice MachinesCirculating Beer SystemsClosed Water Loop Refrigeration SystemWood Boiler SystemClosed Loop... MSRP: ₩58,916 - ₩308,749 Quick Add Add to Wish list