Tested and confirmed working. This is a standard, most popular model, and is very reliable, so people don't often sell them, making them rare on the used market. A special tool with a pressure gauge for the jewelry industry. I have been using it, so it works without any problems. You can use it immediately if you prepare a commercially available bicycle pump. - Brand: ROMANOFF - Application: For the jewelry industry - Features: With pressure gauge A famous wax pot from USA ROMANOFF. This pot is used to pour wax into rubber molds. Thank you for viewing. This is a specialized tool, so please purchase it if you have the necessary knowledge.