Silverline Anti Freeze Tester 7C to 37C

Amazon

Coloured discs indicate protection level Tests coolant levels Easy-to-read temperature table Sturdy plastic body Suitable for use with ethylene glycol anti-freeze, Weight: 0.27337320488 Pounds, Manufacturer: Silverline

Electrical World

Disc-type tester with plastic body and rubber bulb. Freeze protection level indicated by 6 x floating coloured discs. Easy-to-read temperature table. For determining levels of ethylene glycol anti-freeze.