Our septic tank was under about 4' of dirt on the inlet side and 3' on the outlet side. I'm 64 and tired of digging out the dirt to service our tank. So I installed 2 risers. I had 24" pipe that I had acquired from a construction project. I ordered 2 kits that had the tank flange, safety baffle, lid and sealant tape. The parts arrived within a week. The install directions were clear and easy to follow and their video was very helpful. The customer service was helpful too. It's nice to talk to a human who knows their product and can answer installation questions. The quality of their product was sturdier than I expected. I would recommend their Septic tank risers.