The MCM Engineering Quick Connect Air Connector does not require tools for connection to be made and installation is less than 1 minute. The QC-AC has a patented technology that eliminates the need for hose clamps. Made with a clear polyurethane material the QC-AC fitting is cleaner, safer and last much longer than standard fabric and hose clamp. The 8-inch side of the QC-AC reducer has the BFM Fitting patented connection and the 14-inch side can be ordered with the Universal Zipper/Velcro or Velcro only to match the PCA duct being used by the end-user.