Features: Premium stainless metal cores and aluminum alloy housing secure erosion resistance and high temperature durability, providing a stable fuels check valves for gasolines and fuels systems. Unique 1 way valves structure prevents fuels backflow while maintaining compatibility with 6mm/8mm/10mm fuels lines, designed for seamless integration into mechanical and automotive setups. Essential for mechanics, automotive enthusiasts, and industrial equipment operators seeking strong fuels line check valves for engine upgrades or machinery maintenance. Optimizes fuels flows control in agricultural machinery, generators, and modified vehicles where stable pressure and leak easy operate are critical. Engineered with accuracy machined interfaces for tool easy installation, this stainless steel check valves delivers long term performances across extreme temperature and chemical exposure conditions. Specifications: Component : aluminum+stainless steel Type: 6mm/8mm/10mm(optional) Package Includes: 1xFuel Check valves note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.