Pelican 1665 5-Piece Foam Set Foam is die-cut into one inch squares An easy do-it-yourself system for customizing the interior of you Pelican case Contents stay in place and get extra protection at the same time. Replacement foam set for the 1660 Case Layers of foam are pre-scored in tiny cubes An easy do-it-yourself system for customizing the interior of you Pelican case Contents stay in place and get extra protection at the same time.