Equip your semi truck to be Ready for the Road Ahead , with the Prima Brake Components Polyurethane Single Lip Gladhand Seal, a key piece that creates airtight gladhand connections. By utilizing premium materials that won't crack or dry out, this replacement component is able to seal the hoses and airlines between a vehicle and trailer, preventing leaks and pressure loss. Built with 100% factory-tested standards to deliver leak-free performance. FleetPride is your First Click in Heavy Duty .