Karcher T350 12-Inch Surface Cleaning for Gas Power Pressure Washers (Deck, Driveway, Patio Accessory) The Karcher Promise: Cleaner. Quicker. Best-in-class cleaning performance. Works in tandem with your Karcher gas pressure washer (up to 2650 PSI) to quickly deliver professional level cleaning without splashback Delivers the most streak-free cleaning available from a pressure washer by keeping the spray nozzles at a fixed height from the driveway, deck, etc. More efficient and quicker: cleans an area 12" wide with two spinning nozzles instead of one Also cleans vertical surfaces including garage doors and home siding