1 Piece of SOLID Pelican High-Density Polyurethane Foam Extremely strong & durable foam - Same foam as comes with your Pelican 1720 case. Each piece is approx. 42.00 x 13.50 x 1.60" thick(approx). This piece will fit in the top, middle, and bottom. The bottom piece will fit snug in the bottom of case. Perfect foam for designing custom inserts.