Feature: 1. One way check valve design prevents backflow in a line. Arrow marking indicates fluid flow direction. 2. Constructed from aluminum alloy for high performance and corrosion resistance. Suitable for use with water, petrol, diesel, oil, and other compatible fluids. Not suitable for methanol. 3. Ideal for use as a fuel check valve in carburetor and low-pressure fuel systems in automobiles, marine vessels, helicopters, motorcycles, and similar applications. 4. Easy to install and replace. Align with the directional arrow and connect the fuel line. Secure with hose clamps to prevent disconnection. Specification: Material: High quality aluminum Color: As shown in picture Size: 6mm, 8mm, 10mm, 12mm Function: Prevents fuel from flowing back to the tank, maintaining fuel in the line Fitment: Compatible with carburetors and low-pressure fuel systems Package Included: 1 x Fuel Non-Return Check Valve