2Inch (50mm) Square Plastic Hole Plugs Insert (20 Pack), Heavy Duty Black Hardware Plugs and Unistrut End Caps for Square Tubing, Glide Insert for Pipe Post, Chairs and Furniture by Prescott Plastics

These were GREAT! Nice finish, workmanship, and pliable enough not to crack upon install. Accurate dimensions (ID/OD) and easy install. Its a pleasure when caps are well made, finished, and fit correctly, as is the case here, and aggravating if poorly made hard plastic that cracks and fits poorly (NOT the case here - these are EXCELLENT!). Comes in a resealable storage bag which is a nice touch.

Perfect for 2x2 metal tubing. Fits into space nicely, and doesnt seem like it would back out easily

Simple and great

good caps

Much better upgrade on a square tube frame table. Using a rubber mallet these slipped into place for a tight fit.

Great product

Fit perfectly!!

as expected

Was what I ordered

The cap was a perfect fit for an end cap for square tubing on a boat bumper.