FOSC650 Fiber Optic Splice Closures. Single-ended base with four-latches dome design and reliable cable attachment system. There are 3 cable segments: 2 for use with the small gel seal blocks/entrance ports and 1 for use with the large gel seal blocks/entrance ports. Fully removable base for easy cable access during installation and provisioning. Superior gel sealing technology incorporated in interchangeable and fully wrap around gel segments. Compatible with a wide range of fiber cable sizes and types.