HIGH SPEED BUFFERS ARE NEEDED TO GET THAT WET LOOK FLOOR SHINE. THEY RANGE IN SPEED FROM 1500 RPM TO 2500 RPM. ALL OF OUR ELECTRIC MACHINES ARE 20", ALL ARE MADE WITH THE SAME HIGH QUALITY 1.5 HP DC MOTOR. ALL HAVE 50' EXTRA HEAVY CORDS. ALL HAVE LARGE NON MARKING TRANSPORT WHEELS. THEY ALL COME WITH FLEXIBLE PAD DRIVERS. WE HAVE THREE STYLES TO CHOOSE FROM