Hey I purchased this grommet you recommended and received it in the mail today. The picture on the eBay listing shows a grommet with a rounded lip side and a square lip side. The grommet I received is square-lipped on both sides. It looks like it is something universal so you could install it either way. The inside of the grommet is ramped/beveled/sloped on both sides presumably to make it easier to push the filler neck through. To be honest, it looks like what most of the filler neck grommets look like that you buy on the internet. Did they send me the wrong thing? I could understand where the rounded side might make it easier to insert into the tank, but that is not what I have. Would appreciate your thoughts.