Biohazard Warning Symbol Tow Trailer Hitch Cover Plug Insert 2" Don't leave your tow hitch hole open and exposed for the world to see! Keep it covered and clean with this Graphics and More tow hitch cover. This cover will fit standard 2" receivers only. This will NOT fit the 1.25" receiver. The cover is made from black ABS plastic and includes the UV and water resistant resin-topped design as shown. The square image is 3" X 3" in size.