(HJ110) The convenience of a hydrometer jar makes taking gravity readings of your wine or beer a simple task. Just partially fill the hydrometer jar with enough liquid to be tested. Submerge the hydrometer, and while it`s floating get your reading. Stands 12 inches tall with broad standing base; won`t teeter over. Made of good clear plastic. Cylinder diameter is large enough to accommodate all of our hydrometer we sell. If testing distilled spirits, we recommend on of our glass hydrometer jars.