This launcher was built in response to customer demand for a cleaning solution for applications over 3½”. The launcher comes complete with our UC-4.5LN locking nozzle which is machined from aluminum and anodized for durability. This launcher is equipped with a -8 SAE connection for correct SCFM air flow requirements and is capable of passing 50% more SCFM than our other launchers. This is extremely important when doing applications above 3½” ID to allow the projectiles to pass through long lengths of hose, tube or pipe. The UC-HL4.5 is capable of cleaning 1/8” through 3½” when combined with our adaptor rings and nozzles using the UC-LR locking ring in place of the UC-4.5LN locking nozzle.