It belongs to the mechanical pressure sealing joint system and is a splice protection device that provides optical, sealing and mechanical strength continuity between adjacent optical cables. Optical cable splice box is a popular name, its scientific name is optical cable splicing box, also known as optical cable splicing package, optical cable splicing package and gun barrel. A small metal, plastic or fiberglass. Pepperl+Fuchs offers a comprehensive range of terminal boxes and junction boxes in types of protection Ex e (increased safety), Ex ia (intrinsic safety), Ex tb (dust protection by enclosure), and Ex op pr (protected optical radiation). They are certified in accordance with international explosion.