Feature: 1. One Way Check Valve Design for inhibiting backflow in a line, arrow marked on valve, showing fluid flow direction. 2. Made of aluminum alloy, high performance and anti-corrosion, suitable for water, petrol, diesel, oil, and other fluids. (not applicable to methanol). 3. Ideal fuel check valve for carburetor and low-pressure fuel systems of cars, ships, helicopters, ships, motorcycles and others. 4. Easy to install and replace, just according to the little arrow on the valve, connect the fuel line. can make the pipes don"t drop off with some hose clamps Specification: Material: High Quality Aluminum Color: Like the picture show Quantity: 1 pc Size: 6mm,8mm,10mm,12mm Function: prevents fuel from returning back to the tank and keeps it in the line. Fitment: Fit for Carburettor and low pressure fuel systems When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it