Gravely Model L Older Style Vertical Air Filter Part 13042, 13042P1, L823D L832E Gravely Model L/C - Older Style Vertical Air Filter Part Numbers: 13042 13042P1 L823D L832E Fits older model L/C walk behind Gravely tractors Dimensions: OD: 3-3/4" ID: 2-1/8" Height: 4-1/8"