Marketing InformationManufactured from 0.02 in white coated aluminum. All sign-types are screen printed with a fade-resistant red ink. Each sign is shipped with a clear protective plastic-coating which can be removed at time of installation. Each sign-type meets or exceeds NFPA13 requirements. All signs (except 7 in round) are drilled in four corners to allow for easy installation. All signs (except 7 in round) may be installed with sign chain or with any fastener that is suitable for the material that the sign is being attached. The 7 in round bell signs are center drilled to allow for installation directly to the bell gong assembly. Type A 9 x 7 in control valve signs are drilled with the same four hole pattern as type B 6 x 2 in signs to allow for attachment of type B to type A.