This OEM Fuel Filter is a white, individually sold, plastic part, which measures 3 x 1.25 inches. It can be installed using pliers and is rated as Easy to install by customers (Tip: Make sure the fuel clip is secure when installing). This part is attached along the fuel line, between the fuel tank and carburator, and is used to filter contaminents out of the fuel. If broken fuel will leak, and it will smell. If clogged, there will be no fuel flowing out of it. If broken or clogged, it should be replaced. It should also be replaced during regular maintenance. Check your owners manual or model number to ensure you are selecting the right part.