For transfer of petroleum products fuel lines vapor emission lines and vacuum smog controlFuel line: 3/16 inch inner diameter (0.5CM) and 1/3 inch outer diameter (0.8CM) Hose Clamp for 1/3-inch and 1/4-inch Fuel Filter with an inner diameter of 1/3-inchesThe Fuel Lines are oil resistant, cold-resistant and ethanol tolerance; Custom Extra long 9.8 Feet Length (3M) can be cut to size for all your applications For use in mowers tractors snow blowers dirt bikes and just about all small engines