After digging out my septic tank cover for a pump out, I vowed not to do it again. Reviewed online several products and selected Aero-Stream as I was able to get an exact (16") one piece riser section. The pricing was about the same as the others. Ordered on a Sunday and delivered on Thursday afternoon. The instructions were clear, and I was able to do the install in an hour after delivery, including backfill and seeding.
Had a follow up email from Mr. Dlobik after sending Aero-Stream a picture of the finished product. All went well. Would highly recommend.