HSR-18. Eliminate those blind spots and danger areas. Prevent those costly accidents...reduce insurance rates. Reduce employee or customer theft of expensive merchandise. Convex mirrors are built to last. Mirror backing is a heavy silver deposit protected by a coating of copper paint for maximum reflection power. Trim is finished in a long-lasting non-tarnish metallic plastic. Heavy duty ball socket permits easy, pinpoint adjustment. Installs easily from wall or ceiling with rugged mounting bracket provided. Available in glass or acrylic. FOB Shipping Point.