BREWfractometer&trade; Extreme (BREWx) - 0-40% Brix and 1.000-1.180% Wort Specific Gravity ATC Refractometer - FOR THE DERANGED BREWER! 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 BREWfractometer 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!