The bracket is designed so it can easily attach your 3" or 6" DRIPLOC STINGER Duct Cleaner to your Mosmatic duct cart. Simply swap out your existing mounting bracket with the STINGER bracket and attach with existing Mosmatic hardware. 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 .