Hand-held Refractometer MASTER-10M Model: Master-10M Cat.No.: 2373 Scale Range: Brix 0.0 to 10.0% Minimum Scale: Brix 0.1% Size & Weight: 3.3x3.3x20.4cm, 160g -MASTER-10M is a low concentration model (measurement range Brix 0.0 to 10.0%) -Good for measurements of low concentration fruit juices, cutting oil, etc. -The MASTER-10M is made of metal, and the MASTER-10PM is plastic. The specifications are exactly the same. For salty and acidic samples, choose the plastic body, MASTER-10PM.