Diamond Cut Filter Grids

FILTER GRID (DIAMOND CUT) APPROX: 27″ x 16″ 680mm x 400mm These quality polypropylene filter grids specifically made for aquatic use are 1/2″ (15mm) thick and each square is 5/8″ (18mm). Used in virtually all professional filters and highly recommended by us, these can easily be cut to size or cable tied together for larger filters. This is marine-grade plastic and is fine to use in saltwater.