Features: This fuel saver is made of premium quality ABS material which is durable for long time use. It can effectively improve your gas mileage, you can save hundreds of dollars a year on fuel costs. With increased horsepower output, a better and faster ignition and reduced carbon monoxide emission, eco-friendly. Simple to install, neither tools nor cutting of fuel lines is required. Practical and stable characteristics, high performance and high reliability,quicker starting. Universal for all car, motorcycles, trucks, boats, will dramatically reduce engine maintenance costs by eliminating carbon and varnish deposits. Carbon monoxide and hydrocarbons emission are reduced by 50%. Specification: Color:Yellow Material:ABS Quantity:1/2/4(optional) Size:37 * 29mm / 1.5 * 1.1in Package List: 1 set of Fuel Saver1、This fuel saver is made of premium quality ABS material which is durable for long time use. 2、It can effectively improve your gas mileage, you can save hundreds of dollars a year on fuel costs. 3、Simple to install, neither tools nor cutting of fuel lines is required. 4、Practical and stable characteristics, high performance and high reliability,quicker starting. 5、With increased horsepower output, a better and faster ignition and reduced carbon monoxide emission, eco-friendly.