The Wearwell 788.12x3x3GRBK Modular Diamond-Plate ESD Modular Interlocking Natural Rubber Floor Tiles provide reliable, long-term protection from static discharge and worker discomfort. Its rubber compound is conductive throughout for consistent performance. The size is ideal for individual workstations, yet has interlocks on two sides so multiple mats can be snapped together, in virtually any configuration without additional connectors. For maximum effectiveness, ground the mat and keep the surface clean. Color: Black (BK).