RV "Locking" Bumper Plug

 
The True & Only "Locking" RV Bumper PlugSecurely Holds Sewer Hoses in Place
  • Fits Standard 4" Bumper
  • Push in Center to Lock
  • No Drilling or Welding
  • No Hinges
  • Weather and UV Resistant
  • Made of Thermoplastic Rubber
Click to enlarge