Lamp / Clearance & Marker Aerodynamic Yellow

1 Way Check Valve Expels Water, High Impact Base, Polycarbonate Lens & Base, Uses Reliable #3157 Wedge Base Bulb, Retrofits To Sentry Lamp 53063 & 53163, Exceeds SAE J2039 June '94, Hydrophopic Vent Filter In Housing Expels Water Vapor When Lamp Is Lit To Manufactured to Meet or Exceed O.E.M. Specifications in Function, Form & Fit.