SIGMA-Raven Products offers an extensive line of Thermo Plastic Water Meter Boxes, Meter Pits, Extensions and Lids made of High Density Polyethylene. The box and lid have excellent strength to weight ratio. The lid is light weight, durable, closed cell (frost protection) and radio waves from the water meter easily pass through the Polyethylene. Our boxes and lids are round, rectangular or oval in any size or configuration. They can be designed and manufactured to meet your specifications.