Gator GRW-DRWFOAM-4 Replacement Foam for GRW-DRWDF4Rackworks Series Drawer Foam Replacement Foam for GRW DRWF4 Get the Diced Foam Block for Rackworks Standard Depth 4 RU Drawer from Gator Cases as a replacement piece, or for one that you wish to reconfigure. The foam is configured as diced 1 2" pluck made from layered polyurethane. Replacement Diced Foam Block for use with any Rackworks Standard Depth 4 RU Drawer Layered Polyeurethane Diced Foam with 1 2" pluck configuration