Welcome to the Mr. Yellow Cap Store!
Gas Can Cap Replacement and More
Shop the Mr. Yellow Cap Store for a Gas Can Cap and Vent Replacement and Never Lose the Yellow Gas Can Cap Again!
Still not sure if Mr. Yellow Cap is the right product for your gas can cap replacement needs?
Check out the FAQs below or visit our FAQs page for more information. We are sure to have the answer you are looking for!
The interior diameter (ID) of Mr. Yellow Cap is 7/8 inches or .875 inches. For a snug fit, the outside diameter (OD) of the spout needs to be at least .845 inches. If your spout has a smaller OD, then you can still use Mr. Yellow Cap as a gas can replacement to keep debris out of your gas cans.