FO dome-end closure for max. 144 splice connections, featuring a mechanical locking system, suitable for cable-to-cable splicing with fiber branching, individual strain relief foreach cable, splice tray holder with loose tubes storage, repeated opening does not wear off the sealing material, the locking system offers sealing and locking option, continuous ground connection, valve for leak testing. Closure body and flange are made of HD polyethylene, and the turnlock fastener of fiberglass-reinforced PE, resistant to alkaline earths, salt water, fungal and putrefactionbacteria, strain relief ring and splice tray holder are made of stainless steel. The splice closure can be used in ambient temperatures of -20 to +60° Celsius and water depths of 6 meters (IP68). It can be equipped with 12 splice trays R30 or 6 splice trays R40.