For powerboats and sailboats less than 12m or 39.4'. Chrome-plated brass. 1nm visibility. Case Material: Chrome-plated zinc Mounting Hardware: #8 FH sold separately 4" x 3-1/8" Base, 1-7/8"H Volts: 12V Draw: 0.80A Built-In Flag Staff Socket Replacement Bulb: Model 297376 Warranty: Five years