Got the 20 inch and the 24 inch x 8 inch complete riser system sets. Perfect for what I needed.
The product was easy to install and is a nice improvement over the cement riser it is replacing.
Well built easy to assemble
I purchased two 24x8 riser kits and safety lids to stop rain water from seeping into my septic tank. I also had gutter installed on my house and connected drain pipes to the down spouts to move rain water away from my house and septic tank. (I buried yhe drain pipes.) After installing the riser kits and everything else, I have full confidence that my septic tank will be working a lot better.