Features: 1) Vertical type 2) Hoop is used to fix and seal FOSC cover and base 3) Provided with 4 fiber entry/exit ports 4) Simple installation 5) The FOSC is suitable for protecting fiber cable splices in straight-through and branching applications 6) Can be placed in aerial, underground, wall-mounting and handhold-mounting and duct-mounting application 7) Based on an advanced formula, the plastic parts are made of injection molded, high-strength engineering plastic PC by numerical control equipment 8) Effectively prevent products from aging caused by coldness, heat, oxygen and ultraviolet radiation 9) The strong housing and main components provide fire resistant, waterproof, and quakeproof properties while protecting splices during pulling, torsioning and impacting 10) Ensures long-term reliability and usage under ambient temperature from -40 to + 65degree 11) Advanced internal structure design 12) Fiber suffers no attenuation 13) Designed in Slide-In-Lock and its opening angle is above 90 degrees 14) The bend radius meets with the international standard 15) Easy and fast to increase and reduce FOSTs and fix fiber cable 16) Innovative elastic integrated seal fitting 17) The housing of FOSC is spacious in particular, while straight-through fiber cable is for branching application, fibers not cutting off are for straight-through after being fixed and winded, fibers cutting off are for branching after fusion splicing with fibers of other branching fiber cable 18) Easy and convenient for installation, maintenance and reuse 19) The earthing deriving device can be installed on the housing of FOSC for deriving metallic parts of fiber cable for earthing connection 20) Pressure testing valve can be installed as well for pressure testing and sealing testing after injecting air 21) Outside dimensions (height and diameter): 410 x 190mm 22) Additional tray-fiber holding tray is used to hold straight through and reserved fibers with protective coat 23) The installation accessories provided with the FOSC: 1 piece of special wrench, earthing wire, nylon tie, labeling paper, desiccant and 1 set of metal hoop 24) Accessories for customers\'\' selection: earthing deriving device, pressure testing valve and buffer tube, small heat shrinkable fixing sleeve and big heat shrinkable fixing sleeve