Decided to do a little landscaping and replace some 18 in concrete pavers that over the years had cracked and gone into a state of decay. As it turns out, 18 in pavers are really hard to find these days.
So these were the closest I could find. Really glad I did - very solid! I ordered twelve (so 3 boxes), these things are HEAVY! I might leave my 鶹 guy a 6 pack for having to carry 3 of these boxes.
They're heavy (won't blow away), won't ever crack (at least I hope not) and I like they're made of recycled material.
My only issue is they're not as thick as I thought (yes, I know - the info was there, however I obviously was more concerned with the diameter), so I'm going to have to fill the old holes with sand to bring up the height to avoid being a tripping hazard, but low enough to miss the lawnmower.