Mercury Floor Machines DC-19-1170 Ultra D.C. High-Speed Burnisher 1.5 HP 19" 1170 RPMMercury Floor Machines DC 19 1170 Mercury Ultra D. C. High Speed Burnisher 1. 5HP motor, 19" Apron, 1170 RPM Burnishers operate at higher RPM than slower buffers. Not only this, but they have a larger surface area, allowing one to easily and effectively clean large areas at once. Perfect for business or even supermarkets. This specific burnisher is equipped with a 1. 5 HP motor, 1170 RPM machine speed, and a 19" Apron size. 1. 5 HP, 15 Amp, D C