I was elated to find these online because I have a 107 year old house with 8 standard residential radiators. I ordered half a dozen and was prepared to order more (some of my radiators are long) and when I picked up the box from Walmart I was elated. No more static shocks!
As soon as I got home I went to hang the first one, and discovered that these aren't made for OLD radiators, they're made for the portable, electric radiators or very narrow, much newer, permanent ones. The hooks won't reach where they have to go to hang, and the serrated side that should go against the radiators and the old radiators don't even mesh.
If you have an old house with the standard sized radiators, these will be a bitter disappointment.