The JackMoon® Fiber Optic Simplex Duct Plug provides a reliable, professional seal for conduits containing a single fiber optic cable. Designed to split apart for easy retrofit around in-place cables, it features an expanding thermoplastic elastomer gasket that forms a tight, water- and air-resistant seal, protecting critical datacenter and telecom infrastructure from environmental intrusion. Constructed from non-metallic, corrosion-resistant materials, this cost-effective plug installs quickly without tools and accommodates various conduit and cable diameters, including single-mode and multi-mode fiber. Part of the Cal Am System, it delivers a comprehensive, long-lasting solution for securing and organizing fiber optic cables in datacenter, telecom, and utility applications.