Compatibility: Compatible with Weatherhead, Dayco, or adjustable crimpers, interchanges with Weatherhead U-Series; fit for 1/4" I.D. hydraulic hose, 1/4" JIC female 90° end. Durable Materials: Made of high strength carbon steel, retains the strength and rigidity of the base steel, provides reliable protection for hydraulic connections. Leak Prevention: With a secure fit for hydraulic ports and connections, it effectively prevents fluid leaks during maintenance procedures or transport. Application: Perfect for fluid power systems and other hydraulic systems, effectively preventing leaks and pressure loss. Any questions, please feel free to contact us anytime. 10PCS Hydraulic Hose Fittings