30x15cm per pcs.
16pcs can be jointed to form 120x60cm

Fish Tank Divider Filter Board.
Environmental protection without side effects,for both fresh water and sea water. Aquarium Egg Crate Drip Tray Cover Holding Net For Sump Wet Dry Filter.
You can slide this egg crate into the filter channel and make the light more direct.

Description Material: plastic. Size: 30*15cm 
16pcs /pack