Prepare your semi truck to be Ready for the Road Ahead , with the Pelican Worldwide 4" Aluminum Female Coupler that provides a quick and easy way to join hoses or other similar equipment. To lock into place with a male counterpart, this replacement hose uses a cam lock mechanism that seals the two couplers together without needing additional tools or accessories. Engineered with a leak-proof design to deliver long-term reliability. FleetPride is your First Click in Heavy Duty .