48 Cores Optical Fiber Splice Closure (2INLET 2OUTLET ) 2. Purpose: direct-burying, wall-mounting, Pipeline laying way 3. 8 (CM) Dome. Shop our 48 core fiber joint boxes for reliable FTTH installations. Durable, waterproof, and designed for easy splicing. With the advantage of cost-effective, light weight and easy installation, suitable for use in all kinds of fiber optic networks connecting different. The SJ-ODB-M14 optical fiber junction box 48 cores is made of iron and comply with the IP-55 standard. It is widely applied to the splicing and distributing variable optical cables by aerial, duct and burier.