Cold-Chek Disc-Type Anti-Freeze Tester THX106Large professional-size (16 1/4″) tester is accurate at all temperaturesTests coolant, hot or coldEasy to read discs are magnified by convex design of the clear SAN plastic barrelProtection scale is printed in both Celsius and FahrenheitBeyond 70% anti-freeze, cooling and corrosion effectiveness is reducedOne-piece bulb and neoprene dip tubThis large professional-size tester is accurate at all temperatures and is used to test coolant, hot or cold. It has a special feature, the 6th disc shows overprotection and a loss of cooling efficiency. Made with the durability to last! Click Here. Double your traffic. Get Vendio Gallery – Now FREE!