Perfect for my needs. Great product and very well made. Highly recommend.
I needed a flat lid for the tops so mower would clear them. These are very nearly flat and will be fine. I also like the idea of putting concrete in the lid. This will make them heavy so they will not need to be screwed down. And will seal well, better than needed. -- Steel or aluminum lids were way to pricey.
Sturdy product, will be exactly what I need once concrete added into frame of lid for weight.