This bucket is bigger than I expected, but works fine for my Unger washer. It would indeed fit the 18" pole head. Mine is the 14" size. It has markings inside to correctly dilute the solution and a sturdy handle. Don't know how it happened but somehow mine cracked on the side near the handle. It arrived intact best I could tell and I didn't notice the split while we first used it, so I don't know if it was there and only became obvious when filled with water and moved, or if it somehow got broken later. The split is from the ledge top to about 1/3 down the end side so it looks like the bucket will still be useful. I wouldn't fill it higher than that anyway, and the handle is still securely attached. Point is that with this rigid plastic breakage is possible so it's best to take care of the bucket and treat it carefully.