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Clean White Polycarbonate Aesthetic: Molded from premium white plastic to match white commercial trailer panels, delivering a seamless, clean look for fleet bodies.
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Low-Profile, High-Strength Design: Engineered with a compact footprint that hugs the trailer frame tightly, minimizing the risk of tree limb snags, low clearance hazards, or loading dock impacts.
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Premium Polycarbonate Construction: Built from top-tier, heavy-duty polycarbonate plastic that resists fracturing, structural warping, and severe UV cracking over millions of road miles.
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45-Degree PC Compliance Ready: Fully suitable to satisfy stringent DOT/PC corner clearance requirements when positioned on an appropriate 45-degree angle alongside standard Super 21 incandescent or LED lamps.
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Industry-Standard Fitment: Designed as a direct form, fit, and function aftermarket replacement component for standard 21-series rectangular mounting bracket configurations.
Truck-Lite 21720 Super 21 White Polycarbonate Rectangular Surface Mount Bracket – 2-Screw Base Mount for 21 Series Lights
Provide a clean, highly visible structural foundation for your vehicle's safety lighting with the Truck-Lite 21720 Super 21 Rectangular Bracket Mount. Explicitly engineered to house industry-standard rectangular 21 Series clearance and side marker lamps, this heavy-duty white base mount is a preferred choice for commercial freight trailers, dry vans, reefers, box trucks, and heavy-duty utility fleets.
Molded from premium-grade, impact-resistant white polycarbonate, the Truck-Lite 21720 delivers a bright, clean look that blends seamlessly with white trailer bodies or aluminum skin panels. Its low-profile, high-strength design accelerates vehicle assembly and cuts down on fleet maintenance downtime by allowing compatible Super 21 lamps to quickly snap directly into place, creating a reliable and secure housing channel.
Note: This item consists of the raw mounting bracket component only (non-kit) and does not include an integrated wire harness or lamp assembly.




