Extends up to 6x it's original length Retracts to it's original size when not in use Hose works with standard 4" dust collection fittings Extend the EZ Flex hose up to 6 times it's original length and retract it back to it's original size when not in use! This makes EZ Flex hose perfect for any size workshop. Maneuver in, out and around your shop machines without worrying about the amount of slack on the hose. The hose works with standard 4" dust collection fitting sizes