PACKAGE INCLUDE: 1 pcs 16.1 inch undercarriage washer 1 pcs 15.7 inch straight extension wand and 15.7 inch curved wand. Their size larger than the same type of under car cleaner. Under car washer with 4 spray nozzles and 2 casters can use for hot and cold water power washer. TIPS: Undercarriage cleaner’s pressure range is 1500 PSI to 4000 PSI it can work better when the pressure’s 2500 PSI or higher. Please make sure your working pressure is HIGHER than 1500 PSI. WIDE APPLICATION: Power washer undercarriage cleaner works for Clean road grime oil and fuel contaminants under cars trucks SUVs commercial-size vehicles and trailers widely. It’s convenient to clean and avoid crawling under a vehicle. EASY TO INSTALL: First connect straight extension wand to undercarriage washer; Second connect curved wand to straight extension wand; it can be easier and quicker. Then quick connect your pressure washer gun to angle wand. Finally you can pull two wands into your car by con