FOSC 600D-XL Fiber Optic Splice Closure Kit (Description code FOSC600-D8B-R2-6-X2VXL, part number 371599-000). Kit includes six (6) FOSC D-size ribbon splice trays pre-installed (ribbon-type trays), two 4-port gel blocks, XL-version slack storage basket, two ground feed-through lugs, flash test valve, and associated closure hardware and components. Designed for gel cable sealing, field-configurable for butt or in-line splicing, and suitable for pole/strand/wall mounting in outside plant environments.