Lightweight Handling - Heavyweight Protection! Lightweight, yet strong, the SKB 19-inch racks are made of military grade 50-100 high molecular weight polyethylene material. They are stackable and less than half the weight of wooden racks. The draw-tight latch front and rear covers are gasket-sealed to keep out moisture and dirt. With the front cover removed, the 19-inch mounting flange is close to the edge, which makes it extremely easy to visually read the dials and LCD screens on front of your equipment. The snap in A/N case hardened hardware allows for easy replacement of mounting nuts if failure should ever occur. With each rack comes sufficient mounting hardware plus spares. Allow 4 Weeks For Delivery.