This replacement Quick-Disconnect Female-to-Male Connector fitting has a 1/4" male end perfectly matched to the Hoses of our Pump Kits (available separately.) The other end has the female Quick-Disconnect fitting that allows you to attach Your existing Pump Kit. The purpose of this adapter is to help you split your vacuum so you can pull vacuum from multiple sources at once (will require other hoses/fittings - sold separately) for no loss of vacuum when disconnected from the male Fitting.