I am interested in Rubber Container Door Seals, Rubber Extrusion-072021.Can you tell me the dimensions of this item? Rubber Container Door Seals, Rubber Extrusion-072021.I am looking for only about 10' to use on the wheel openings of my RV. I assume its flexible and can be screwed in from the bottom where the little dimples are. Where can I get this in the US.