Portable Hand-held Refractometer, Specially Designed for Brix Control. It is Operated by Pouring a Drop into the Designated Compartment, Then Lowering the Clear Transparent Lid & Looking Through the Viewer, While Adjusting the Knob. Portable & Supplied Inside a Hard Case. with Instructions Manual in English & Spanish, & Presented in a Kraft Design Box. Contents: Refractometer, Hard Case with Foam Lining, Pipette, Screwdriver, Cleaning Cloth. Colours: Black. Minimum Quantity: 10.