Special Nichrome wire retains an even heat temperature required to cut and shape Woodland Scenics foam products. Package includes 4' 1.2m of wire. Use only with Woodland Scenics Hot Wire Foam Cutter (#785-1435), sold separately. AN IMPORTANT NOTE: This tool and its accessories are designed for use with Woodland Scenics own high-density, nontoxic expanded polystyrene foam. Since many foam products emit a toxic gas when heated, this tool should never be used with ordinary Styrofoam, foam rubber or other foam products.