The refractometer
has readings from 1.31 to 1.81 with pull out eyepiece. It gives you clear focus and reading. It has polarizing filter, monochromatic filter, and light source.
Customer approved, this refractometer is easy to assemble and use. With readings ranging from 1.31 to 1.81, it gives the user a clear focus and accurate reading. Its compact design makes it perfect for jobs on the road if necessary. The refractometer comes with a handy pullout eyepiece, a polarizing filter, a monochromatic filter, and can be used as a light source. See this refractometer and more great tools at Stuller.com/tools.