Made to your specifications, our inflow dishes are long lasting, extremely durable, and easy to install. They're made of one of the strongest polyethylene compounds available for inflow dish manufacturing, which means they won't absorb moisture, flex/crack over time, and are corrosion-proof from the typical gaseous output from waste-water collection systems. 
 
These dishes are made to order to ensure you've got exactly what you need for your project. To provide our team with proper measurements, see the diagram provided. We'll need dimensions for: (A) the inside diameter of the manhole cover, (B) cover thickness (not overall thickness, just from one end of point (A) to the outside diameter of the manhole cover), (OD) the outside diameter of the frame where the cover will sit, and (ID) the inside diameter of the frames lip. For tapered frame and cover, measure the frame at the closest point to the rim.