Tap MY Tree Stainless steel hydrometer test cup used with maple syrup hydrometer to test sugar content of maple syrup and VT Tested Maple syrup hydrometer with Baumé scale and Brix scale. Instructions included. Test cup height is 8 inches and diameter is 1 inch (for use with standard maple syrup hydrometer). Stainless steel design allows for use for many sugaring seasons Required when using hydrometer Hydrometer needs to float freely when testing maple syrup Note: All Maple Syrup Hydrometers sold into the state of Vermont must be this version, which is tested for calibration by VT Agency of Agriculture, Food, & Markets. Used to measure the density of maple syrup at a specific temperature Brix Scale and the Baume ScaleHydrometer is used to determine when to stop boiling Professional grade hydrometer Glass instrument – handle with care Note this hydrometer is calibrated specifically for maple syrup (not to be used for beer or other purposes)