These are Universal replacement RV Bumper End Caps. They measure 4" x 4" and are made of Rubber. These end caps fit our 4" x 4" bumpers as well as our Custom Starbrite bumpers. They are a perfect replacement for your RV or Motorhome bumper caps. They have been used on many different RV’s and Motor homes like Fleetwood, Winnebago, Forest River, Thor, Skyline, Monaco etc. They are in stock and available for immediate shipment from either our California or Georgia locations!