2 Black Plastic Plugs for Square Tubing by Caplugs Package of 4

works

Just perfect---all 12

Worked great for the project

I needed several of these plugs to keep the rain out of the vertical square tubing on my kayak trailer and these fit perfectly with a little trimming of the baffles.

These two inch plastic plugs are what they are. They fit tightly into a square two inch hole!

Excellent quality, Fits perfectly

Came in a package of four and I only needed two but having two extra may not be a bad idea. zEven though they fit perfectly into my new Gorilla-Lift 2-Sided Tailgate Lift Assist. Fast Delivery Highly Recommend Seller 5 ★★★★★s

Have not had it long enough to give any more opinion

what can I say , there square !

secure in a 2 opening