Stainless Steel Masthead Light 225deg Masthead Light is constructed of stamped 304 stainless steel. For replacement of existing lighting (not for new construction). Installs with three #4 RH fasteners (not included). All USCG approved navigation lights must be mounted properly to provide the correct visual alignment and allow unimpeded sight lines. Please refer to USCG regulations for 1 NM and 2 NM navigation lights for more information. WARNING: This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.