Size: 16? Easy and quick to use. Used with either hot or cold-water pressure washers with pressures from 3000 to 4000 PSI and temperatures up to 180? F. Walk behind. Durable. Removes tree sap, dirt and other non-permanent materials that you want to remove from hard surfaces.The rotary cleaner blasts away dirt, grease and grime in all sorts of tough cleaning areas: – Pools – Decks – Sidewalks – Warehouse floors – Restaurants – Retail/shopping centers – Garages – Etc.