Dimensions: 3-5/8″ L x 2-1/4″ W Stainless steel housing. Certified USCG 2nm, for use on boats under 39.4′ (12 meters). Uses two #8 flat/oval head screws per light (Not included). Meets the stringent requirements for USCG, ABYC A-16, and IMO COLREG. No bulbs to replace – LED’s are Surface Mounted Diodes (SMB). 12 volt. Sold per pair – Red/Green.