Jewelry Lost Wax Cast Combination Vacuum Investing Casting Investment Machine A+. Dual stage deep draw vacuum pump. Quality high temperature double lined vacuum hose ensures years of trouble free service. Investing is Performed On a 11" x 11" Spring Supported Table With a 9" x 8" Bell Jar. 1/2 HP, 3 CFM, dual stage deep draw vacuum pump. Equipped with "EZ-FLOW" oil changing system. With Easy access to service add and change oil. Unit comes complete as shown. Table Top Combination Vacuum Investment & Casting Machine 220v/50/60Hz/1Ph. 4" Silicone Gasket, 1/8" Thick. Silicone ...