Dropping PSI? Replace those nozzles to get back the pressure your paying for. Kit includes 2 nozzles (1- #1503 1- #0003). Nozzles are low profile designed 1/8" body meg tips that are used in duct spinner nozzles as well as certain surface cleaner spray bars. These low profile nozzles must be used in all 3" duct spinners to clear cage/basket walls. WARNING : This product can expose you to chemicals including Cobalt and Titanium Dioxide, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov .