The JD-1000 10 in. round meter boxes and lids are injection molded of UV Stabilized Polypropylene. The 10 in. round body is tapered and has a minimum wall thickness of 0.125 inches. The body has a double wall at the top cover seat area with a minimum thickness of 0.375 inches. The bottom of the body has a 0.250 in. flange. The 10 in. round cover has an average thickness of 0.250 in.