【Quick Connect】: Pressure washer undercarriage cleaner is 1/4" quick plug,easy to connect with included pressure washer wand or other 1/4" quick connect fitting. 【High Efficiency】: Our pressure washer undercarriage cleaner features 4pcs 40 degree fan-shaped spray nozzles clean up to 5x faster than a standard spray nozzle. 【Professional Undercarriage Cleaner】: Working Pressure: 1500 PSI to 4000 PSI. 2500 PSI or higher will have better cleaning,made of durable sturdy aluminum,2 upgraded flexible rubber wheels can rotate 360 degrees. 【Widely Application】: This vehicle undercarriage washer is ideal for removing loose debris (sand, leaves, light soil) from large surfaces such as sidewalks, driveways, decks, patios and undercarriage.Also can be used to clean road dirt, oil and fuel contamination under trucks, SUVs, cars, commercial vehicles and trailers.