We took the suggestions from our resellers to make an Ultra product that was to be able to use right from the bottle no matter what type of cooling loop or tubing size was being used. This lighter viscous coolant will work in anything we have tested it with including 1/8 inch tubing and very low flow pumps. We have also increased the non-conductivity rating to the lowest ever of under 1 microsiemen. This promises to be a great product. Non-toxic formula and also includes Z7 for corrosion and algae control. Simply the most lab tested affordable non-conductive, non-toxic coolant anywhere.