The Emerson FiberSeal™ 12B is a sealed fiber optic splice closure that delivers an airtight, water-tight environment for both above- and below-grade (not direct buried) applications. FiberSeal 12B accommodates up to 12 fiber splices for main cables with up to 0.59-in. outer cable diameter. The unit has two main cable ports and four fiber drop ports. All are equipped with port plugs for unused ports and a fiber optic splice tray. Once assembled, the FiberSeal 12B delivers a hermetic seal that is achieved by simply turning the dome onto the base; no additional operations, products, or tools are required. The FiberSeal 12B resists all types of acidic, soil, and ultraviolet degradation, as well as other corrosive materials.