Review on 🌈 Thexton THE107 Anti-Freeze Tester with Varying Color Options by Allen Wagner

That's a very good price, especially with super cheap shipping. Keep in mind that this refers to animal friendly and environmentally friendly propylene glycol antifreeze like Sierra, not traditional ethylene glycol like regular Prestone etc. In some communities you can even flush old propylene glycol down the drain. Check local regulations. Be patient while you wait for the discs to settle down. The instruction printed on the tool is a bit small but clear enough.