22 Name Stainless Steel Directory installs easily over drywall or masonry surfaces with supplied hardware. Vandal and weather resistant. Viking s vandal-resistant directories are an easily installed, high-quality line of displays, designed specifically to complement newly installed or existing secure-building entry systems. All models feature both weather and vandal resistant construction. The D-series directories are durably constructed from 18 gauge brushed stainless steel to perfectly match the style and function of Viking s stainless steel phones. Applications Use with Viking s K-1900-3, C-3000 or C-4000 multi-tenant entry systems Apartment buildings Business directories are facilities Schools and institutions Public areas Features Economical Attractive Durable stainless steel finish Easily installed over drywall or masonry surfaces with supplied hardware Low profile (3/8in) Vandal and weather resistant Modular system (add additional capacity at any time) Lexan plastic window.