●ESSENTIAL TOOL FOR MAKING MAPLE SYRUP - This dual declaration hydrometer (Brix and Baume) is specially made for maple syrup production.Also works for Cane Syrup! ●UNMATCHED LEGIBILITY - The Pokiphip Sap Hydrometer includes Baume and BRIX Scales. Red marks make it easy to perform both hot and cold tests. Calibrated at 60° F. ●PERFECT SIZE - Approx. 9-3/4″ length (Handblown glass. Length can vary slightly)Includes instruction sheet. ●REUSABLE STORAGE CONTAINER - We have tested and proven our hydrometers to be of utmost accuracy. Unlike most cardboard shipping containers, these tubes will not fall apart if they get wet, and they are resilient enough to be used for hydrometer storage year after year. ●LIFETIME OF USE - Stronger structure for enhanced resistance against breakage, calibrated to give you a lifetime of use!the ballast is a food grade alloy so you can boil with confidence and it will guide you to get high-grade maple syrup.