The K&N 81-0240 In-Line Gas Filter is perfect for racing applications and can be used with a variety of oils and fuels including methanol. The 81-0240 stainless mesh in-line fuel filter has a flange diameter of 5/16 inches. It comes with a 1-17/32 inch body diameter by 1-3/4 inch overall length. The package contains 12 fuel filters. K&N 81-0240 In-Line Gas Filter is perfect for racing applications and can be used with a variety of oils and fuels including methanol.