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. Temperature Range: 37°C to 7°C Celsius Tests Coolant Levels Sturdy, Plastic Body Easy-to-Read Suitable for Use with Ethylene Glycol Anti-Freeze Temperature Range: 37°C to 7°C Celsius Tests Coolant Levels Sturdy, Plastic Body Easy-to-Read Suitable for Use with Ethylene Glycol Anti-Freeze