Thexton Ethylene Glycol Anti-Freeze and Coolant Tester

Sixth Ball shows overprotection. Anti-Freeze coolant tester. Tests to -34 degrees -indicates optimal 50/50 mixture. The original ball-type, specific gravity tester. Ideal for garage or service station. Special 6th ball shows overprotection and loss of cooling protection. Fast and easy to use. Number floating balls measures degree of protection. Temperature compensating for testing with engine hot or cold. Accurate to -34 degrees F. Extra long neoprene dip tube. Complete with vinyl pocket protector case imprinted with instructions.