A splice closure is a protective enclosure used in telecommunications to house and protect the splices of fiber optic cables. These closures ensure that the connections between different fiber strands are secure and shielded from environmental factors like moisture, dust, and physical damage. Typically made from durable materials, splice closures come in various shapes and sizes to accommodate different installation needs. They are essential for maintaining the integrity of the fiber optic network, which is crucial for high-speed data transmission in systems involving telecommunications, internet services, and cable television.