Square Tube CONNECTORS 20mm 25mm 30mm T L Insert Plastic 20x20 25x25 30x30 Pipe (T (3 Way) (A = 25mm))

Bought a selection of 20mm L and T connectors. They are all between 15-16mm. Pretty egregious for something meant to connect tubes. Buyer beware.

I bought a tee connector for 25mmx 25mm 1.5 thick square tubing. two of the sides are very snug the one that goes to side seems to be a bit looser.When comes it was in two halves that you slide together. It is mostly hollow, I will modify it to see if I can pass a cable through it. I will be using this to hold a cloud sensor. My one concern is how well will it hold up to sunlight, will it get brittle?

Not good at least for my application. These took forever to arrive and they are very cheap plastic (not nylon). I wouldn't expect that these would hold up to much abuse or weight and honestly they weren't cheap! Found a better outlet and solution.

I purchased these to connect standard 1 inch square aluminum tubing, but they were too loose in the tubing. I would not have been happy with them even if they fit because they are too weak for the sign frame I need to build. I would not recommend.