Eliminate blind spots and avoid accidents with a CRL Stick-On Convex Mirror. It's designed to go on truck or bus side view mirrors, and reflect objects too close to the vehicle. A valuable visual aid while backing, turning or parking large vehicles, the circular mirror is 3-3/4" (95 mm) in diameter. Encased in a rubber backing, the powerful weatherproof adhesive makes installation as easy as peel and stick.