TRAFFIC CONE BASE, PRODUCT TYPE TRAFFIC CONE BASE, FOR USE WITH PRODUCT TYPE GRABBER TOP CHANNELIZER CONES, WEIGHT 16.5 LB, COLOR BLACK, SHAPE OCTAGON, MATERIAL RUBBER, WIDTH 18 3/4 IN, INSIDE DIAMETER 8 1/2 IN, INSTALLATION METHOD SLIP-ON, LENGTH 17 1/2 IN, HEIGHT 1 1/2 IN