Underbelly seam tape is used for tears and seams on underbelly material. It comes 4" wide and is on a 60 yard roll. It comes in black to match our black underbelly material. Can be used on any RV, Motorhome, or Specialty Vehicle like Fleetwood, Winnebago, ForestRiver, Thor, Skyline, Monaco etc. Dont forget to take a look at our Underbelly Material!