Invest, vacuum and cast using this one versatile machine. Ideal for casting both perforated and solid flasks (up to 7"H) as well as for vacuuming invested flasks and RTV molds, this compact, powerful investing/casting machine is made with tough, durable components. This machine has a built-in 3cfm vacuum pump and an easy-access port making it simple to add oil or to change the oil completely. Its investment table is a generous 11" x 11" in size. Its 1/2hp motor ensures an efficient, effective vacuum for more defect-free molds and patterns.