Combination Lamp, Diameter 4-1/4 In. , Depth 3-5/16 In. , Red, Shape Round, Base Mounting Centers 2 In. , Post 1/4 20 x 3/4, Lamp Type Incandescent, 12 Volt Bulb, Material DURAMOLD/Polycarbonate, Current Rating . 59-2. 1A, Termination Type Hardwired, Mounting Type Two-Stud, Includes Snap-on lens, Rubber compression-sealed pigtail, Removable studs for school bus application