Peterson 176-12 Retrofit 2.5" Adaptor Flange

* Retrofits 171, 176 and 177-series sign-diode LED clearance/marker lights into existing 2.2" mounting holes. * Raised lip on reverse fits into existing hole easy, accurate centering. * Includes three rivets for theft-deterrent installation, or can be mounted with screws (not included). * Made of corrosion-resistant, high-strength polymer.