Bopper Stopper hinged cover can take hard knocks in stride while helping to protect smaller-sized electrical units. The cover and hinge are molded of super tough clear polycarbonate material. The cover and the included adapter plate provide a solid back for surface mount applications. Inexpensive and highly durable, the device features a stainless steel torsion spring to keep the cover closed. This cover is part of a series to help protect push buttons, electrical switches, digital keypads, electrical outlets, smaller-sized pull stations, biometrics, volume or lighting controls and more against vandalism and accidental damage. UL/cUL No. S2466 (over fire alarm stations only), ADA Compliant.