Measures 0-40% Brix AND 1.000-1.180 Wort Specific Gravity (Corrected Scale!) - FOR THE DERANGED BREWER! * Calibrate with Distilled Water - Works with Beer Wort and Grape Must * Solid construction - 50% heavier than the cheap toy units out there. This is a QUALITY Refractometer! * The BREWfractometerTM Extreme (BREWx) is the professional Brewers Choice! Perfect for Meadmakers! The WORLD"s MOST Accurate Wort SG Scale! * Comes in a PLASTIC HARD CASE! Not some cheesy soft case! (10) Year Warranty Against Defects!