Unlike concrete, these large barriers are made from forgiving plastics and can be filled with water or sand. The model is 42" tall x 72" long, holds up to 180 gallons, and contains molded-in bolt holes to mount barricade flashers when necessary. The male-female interlocking pieces accommodate up to a 15-degree angle. We can print the surface with bold lettering including "Area Closed for Construction" and other safety messages.