Colour off material usually grey.
HOW TO USE CARVING FOAM
SilverlakeLLC Silverlake Large Craft Foam Block - 11x17x7 EPS Polystyrene Blocks for Crafting
PROBOSS LIMITED
Foam Blocks, Sheets & Spheres - Dino Rentos Studios, INC.
Block - 2 Thick x 4 x 12 - XPS Foam – The Craft Place USA
XPS Foam
PROBOSS LIMITED
Giant Sculpting Foam Blocks - Insulation Company of America
Styrofoam blocks provide an excellent starting point for many fun, beautiful projects. White material allows children to easily decorate the pieces for customized works of art. Sturdy construction can be used as a base for floral arrangements or craft centerpieces. Styrofoam blocks are perfect for science projects, dioramas, holiday decorations and more.
Hygloss Styrofoam Blocks - White
XPS CRAFT FOAM SHEETS, WARGAMING & HOBBY FOAM, TERRAIN, SCENERY 6mm - 50mm £5.20 - PicClick UK
Foam - The Compleat Sculptor