4 Pack 1.5 Inch Square Tube End Cap Plastic Plugs, 1.5x1.5 Square Tubing Plug, Tube End CapsTubing Post End Cap Suitable for Square Tube Square Plastic Plug, Tubing Post End Cap Square Tubing

fir and worked perfectly

It works exactly like I expected it to. No problem at all.

These plug holes of the appropriate size.

Looks just like the original cover.

These will work for a 1” hole

Easy to install

Just over prices for some cheap plastic. But worked so here are 4 stars

The product is a standard 25mm(1”) Square Black Plastic Plug for 1 x 1 tubing. The product fits my tubing, it does the job. I really needed only two pieces. Other similar products are sold in large quantity packages. This was the smallest (12 pieces) quantity package I could find on Amazon. So, if you need only a few 1 x 1 plugs, buy these.

These fit perfectly in the ends of my railing.

I used them for end caps on the aluminum tubing that my kayak trailer has. Unfortunately the plastic collapsed when installing them.