It's a ABS MPO box consists of box cassette, cover and adapter plate. 

It can load 2pcs MTP/MPO adapter and 12pcs LC duplex (or SC simplex) adapters without flange. It also can load 1pc PG9 cable gland, 2pcs splice modules OS-16 inside for fiber splicing. 

It has translucent cover, convenient for fiber observation. It is max. 24 fibers connection and distribution.