Check the listing for details. Optical Brix Refractometer for Home Brew specific gravity. Color: Brix 0~90%, Condition: Used. Listed at 39.00 USD. Cool refractometrr Has a little piece of something on the edge of the inside lens, looks like a smear of rubber. Still works fine just a little annoying. Please check photos for condition and please ask any questions or concerns. Thanks This Optical Brix Refractometer is a must-have for any home brew enthusiast. It allows you to measure the specific gravity of your brew with ease. This handheld refractometer is designed for use in a variety of healthcare, lab, and dental settings. It comes in a compact size of 8.11x3.27x2.13 inches and weighs only 0.53 pounds. The Brix 0~90% color scale ensures accurate and precise readings. This item also comes with a 30-day money-back guarantee, making it a risk-free purchase. Order now and enjoy free and fast two-day shipping.