THIS LISTING IS FOR A SET OF FOUR ROD HOLDERS. Rod Holder drilled for Three 1/4" fasteners. Oval Flange: 4-1/4" x 3-3/8", I.D. Tube with Liner: 1-5/8". See Dimensional Picture for Reference: A: 4-1/4", B: 1-1/8", C: 1-1/8", D: N/A, E: 2", F: 8-1/4", G: 1"