Quick view Douglas Products Douglas HTF Inhibited Propylene Glycol MSRP: ₪160.52 - ₪841.21 Douglas HTF Inhibited Propylene Glycol in 1 Gallon Containers Recommended for: Block Ice MachinesCirculating Beer SystemsClosed Water Loop Refrigeration SystemWood Boiler SystemClosed Loop... MSRP: ₪160.52 - ₪841.21 Quick Add Add to Wish list