Check the listing for details. CoProof Mason Jar Thumper Alcohol Distill Moonshine Thump Keg A18. Color: copper, Condition: New. Listed at 28.99 USD. Hanging Mason Jar Thumper keg Alcohol Distill Moonshine Thump Keg 1/2 gallon. This listing is for a complete ready to use hanging mason jar thumper keg copper tubes and lid, stainless steel split ring with silicone gasket. Each item is hand-crafted in the United States, professionally soldered with lead free silver solder. The jars can be stacked in series for additional volume and rectification using mason jars allows for complete visual on activity and mason jars are designed to not break during rapid temperature changes. The collection pipe is flush with the bottom surface of the lid allowing vapor to easily escape without building pressure. Placed directly upstream from the condenser these units make a great location to add in fruits and flavors.Included: Thumper Only