Fasteners Unlimited Command Electronics Surface-Mount 12 Volt Taillight - White Base Packaged. Corrosion free design (including sockets) utilizes S-8 style lamp has a high reliability in demanding environments. SAE approved. Replacement Bulb #3157. Dimensions: 8-5/8" x 3-3/4" x 2-1/8". Features of Fasteners Unlimited Command Electronics Surface-Mount 12 Volt Taillight - White Base Dimensions: 8-5/8" x 3-3/4" x 2-1/8" Replacement Bulb #3157 Corrosion free design Formed from quality materials and designed for durability Package Contents: Fasteners Unlimited Command Electronics Surface-Mount 12 Volt Taillight - White Base Fasteners Unlimited 003-81: Command Electronics Surface-Mount 12 Volt Taillight - White Base Packaged