2 inch remesh rebar chair holder

I was pouring a 4" slab and am putting remesh (pre-welded small rebar grid) and needed some chairs to hold it up 2" into the slab so I modeled this up quickly. This is the product I used from Home Depot. The bar has a diameter of about 3.5mm and the height of the two welded courses is just about 6mm.

I printed with ASA for more durability, but ABS, or even PETG should be fine too. I'd avoid PLA, but it might work in a pinch (longevity not sure). I printed with a 0.4 nozzle and pretty standard settings which made the upper support structure pretty much solid.