Work Area Protection rugged, recycled rubber base to provide stablility and support for channelizer cones. Enhanced skid resistance. Ease of stacking and handling. Polyurethane binder to increase weatherization properties. Made from recycled rubber. Fits C42 channelizer cones. 2.4-inches Height, 16 pounds. 17-3/4-inches hex. 7-5/8-inches hole.