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The PETERSON 421R is a red lens reflector designed for vehicle and trailer lighting applications. Constructed from durable plastic, this reflector measures 6.5 inches in length and 2.25 inches in width, making it a standard-size unit suited for side marker and rear identification mounting positions. Rated for 12-volt systems, it provides passive or active light reflection to meet visibility and safety requirements. Installation is straightforward and typically handled by fleet maintenance technicians, auto electricians, or trailer service professionals.
This reflector is commonly used on commercial trailers, utility trailers, box trucks, and similar vehicles requiring side or rear reflective lighting. Its red lens color designates rear-facing or side-marker use in accordance with standard DOT lighting conventions. The compact profile allows fitment in tight mounting locations along trailer frames and body panels.
Designed as an OEM-style replacement reflector for trailers and commercial vehicles requiring a 6.5 x 2.25 inch red lens unit in 12-volt applications.
Installation is typically performed by a fleet technician or auto electrician. Disconnect vehicle or trailer power before servicing any lighting component. Secure the reflector using the appropriate mounting hardware for the surface material; avoid overtightening fasteners into plastic housings. Verify compliance with applicable FMVSS lighting requirements for the vehicle class.
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