MULTIPLE SIZES AVAILABLE Our one-way fuel check valve comes in a pack of 4 valves of different sizes, 1/4", 5/16", 3/8", 1/2", to meet various needs. need to need; One-Way Check Valve Design & Anti-Return Function: This fuel check valve adopts one-way check valve design to ensure liquid flows in one direction, providing unparalleled efficiency; Anti-return function adds another dimension to your fluid management. One layer of control. High-quality materials ensure durability: the one-way valve is made of high-quality aluminum alloy and the surface is anodized to ensure its corrosion resistance and long service life. Robust features ensure it can withstand high working pressures and is suitable for fluids PERFECT OPERATING PRESSURE AND TEMPERATURE: This 3/8 check valve not only withstands high pressure conditions of about 2.9-87 psi (0.2-6 bar), which also operates efficiently at high opening pressure temperatures of about -30 degrees Celsius. °F °F, suitable for vacuum system operating environments. EASY TO INSTALL AND REPLACE - One-way check valve provides easy installation and replacement, making it a worry-free addition to the machine;, Weight: 0.18959754532 pounds, Manufacturer: Rtxbvg