Our Black-Sleeved Stainless Steel Leader Hoses are available 1/4" or 3/8" NPT. They're offered in multiple lengths (8", 10", 12", 24") and also have option of with our without check valves, to help ensure the proper fitment and use. Behind the black sleeves you'll find stainless steel shielded EPDM rubber inside. Each leader hose provides: Minimum Burst pressure of 300PSI, Operating pressure of 0-200PSI and Operation temperatures of -20℃ to 100℃