Measuring and reading the specific gravity on the scale of the hydrometer will be easy with the Tropic Marin Measuring Cylinder. The high-quality plastic measuring cylinder is transparent, has a stable base and a spout. With a height of 36 cm (14 inches), it is ideally suited to determine the specific gravity using the Tropic Marin High Precision Hydrometer. It is no longer necessary to switch off the flow pump for a measurement in the aquarium, just take the monitoring of the specific gravity outside of the tank. It is really simple!Tropic Marin Measuring Cylinder+ height: 36 cm/14 inches+ content: 500 ml/17 fl. oz.+ transparent plastic (PP - polypropylene)+ stable basis+ with spout+ molded graduations+ incl. Tropic Marin Precision Hydrometer