This allows you to be able to attach your 4-inch or 2.5-inch hose from one machine to the next without disconnecting the hose.  The female connector only is for those who have previously purchased our 4-inch male hose ports. Will not work with 4-inch or 2.5-hose ports from other suppliers.
Will only work with connectors that have been purchased from us. (unless you purchase the male and female connectors.)