The 30G Pro machine is a propane-driven, 30-in. planetary grinding, polishing, and burnishing machine, all in one. It is primarily designed for big box store polished concrete projects where a high-speed, large-area solution is needed. The machine is capable of completing 1500 sq. ft./hr. It features three 13  1/2-in. heads, for a 30-in. working area. Use it for wet and dry applications. Superabrasive Inc. 800-987-8403.