This Vac-U-Vest machine is highly reliable and well-proven investment mixing system. Production efficiency and quality is improved by mixing and pouring under vacuum, eliminating air bubbles and reducing harmful investment dust while accelerating the working time. The process is automated by the use of 2 switches for easy operation. This unit is manually controlled by hand valves and is intended for the smaller manufacturer. The machine use thick plexiglass as the chamber sealing lids. Features 120V / single phase / 8 CFM vacuum pump. Maximum flask height is 5-1/2". Mixing capacity (water / powder) is 8 Kg / 18 lbs. Vacuum chamber dimension is 9-1/2"W x 6"H (can accommodate 2 pcs. of 3-1/2" dia. flasks or 1 pc. of 4" dia. flask). Overall dimension is 24"W x 30"H x 23"D and weights 277 lbs. Mixers are sold with or without vacuum pumps.