(Pack of 4) 3 Square Plastic Plugs |10 14 Ga - 3 x 3 Inch (for ID 2.74 to 2.83) | Flexible Ridges n Side Walls | Heavy Duty Impact Resistant 1/4 Thick LDPE Cap - Tubing Plugs

Do the job of capping off the opened ended square tube on my boat lift look is good

The caps are of good quality. However wasnt the right fit for my 3x3 fence tube. Tried returning the item. Says free return in the description, but its not. I gave it 3 stars because the quality is good but -2 for not being honest.

Planned to use for capping a 3x3 steel tube that supports a fence gate. However, the cap isnt large enough to gain enough friction to to anything other that sit on top of the tube. Hope I can find some with larger flexible ridges to hold tighter.

Fit great