Insulators as follows - actual postage additional -- take all three for $8 plus actual postage

U-244 (skirt embossed) MACOMB -- cool piece with a few factory glaze flaws -- just a couple tiny flakes on the sharp upper ridge

U-36 no markings, mold line over dome - cool and crude Pittsburg style - No issues

U-3A (dome incuse) LOCKE - no issues