Residential Electric Sponge 'Berta'
Clean 800 to 1500 sq. feet per hour and leave all joints even and full with one pass. Works on all grout types. Use 1/3 less water on the jobsite, saving you trip after trip for fresh water. The Berta weighs only 84 lbs. and has a sponge life of approximately 10,000 sq. feet. That's exceptional!