Whisper Wash Professional Rotary Spray Systems can be used with conventional hot or cold pressure washers from 2,000 to 5,000 psi. The Classic comes with oversized self-lubricating twin thrust bearings, balanced spray bar and portable breakaway handles for ease of transport and storage. The Big Guy model has an oversized 28-inch housing that covers large surfaces and is crafted with Xenoy, stainless steel and aircraft-grade aluminum for long life. The Platinum Series offers a one-piece unitized swivel cartridge, 5,000 psi maximum working pressure and 212 degrees F maximum working temperature. 800/333-9274; www.watercannon.com.