Check the listing for details. Home Brew Ohio Superior Gravity Testing Combination (Stainless Steel Baster,. Condition: New. Listed at 24.99 USD. Home Brew Ohio Superior Gravity Testing Combination (Stainless Steel Baster, 12" Test Jar, and Triple Scale Hydrometer) Home Brew Ohio Superior Gravity Testing Combination (Stainless Steel Baster, 12" Test Jar, and Triple Scale Hydrometer) - This kit comes with all the equipment necessary to accurately test the specific gravity of your latest batch, and will help to limit the amount of mess that can occur without a baster. The high quality stainless steel baster is perfect for transferring the batch that your want to test into the 12" test jar. The 12" test jar has a removable base that allows it to be more thoroughly and easily cleaned. The triple scale hydrometer will determine the specific gravity, balling degree, and potential alcohol. These can be used to determine when the batch is ready to be bottled and how high or low the final ABV will be.