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

Fit perfectly in 16 gauge tubing

Needed to replace some feet on a shelf. These worked fine, and I now have a lifetime supply. Gave a few to a friend to use, and they work great for him as well.

These are exactly what I needed for a used lofty bed I purchased.

Perfect replacement

everything about it

My butterfly machine by Wate-man Fitness equipment, base rusted away and a local welder fabricated the identical base. These black plastic plugs snapped right in finishing the new base.

The caps worked perfectly on the 2 inch square tubing on my gate.

What I was looking for

Too big

Had stair handrails built on site. These made job look custom