Robinair 75240 Coolant and Battery Refractometer<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Used for measuring the freezing point of either propylene or ethylene glycol based cooling systems</li><li>Can also be used for checking the strength of electrolyte solution batteries</li><li>Precision instrument features high-quality optics with ultra smooth focusing</li><li>Scale range: 32 Degree F to -60 Degree F</li><li>Used on transportation vehicles such as cars tractors tanks ships</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41f6daWHy4L.jpg" noproxy>