What is this connector called and where can I buy it?

[EmmaDonovan]

I can't remember where I found this, I think it was in an Amazon product review. The purchaser used conduit pipes to reinforce the frame of the run, which I think is a great idea and I'd like to do it, but I have no idea where to get those black connectors.

 

[SourRoses]

Everything is a "Doohicky".
(Sorry)
You could try searching for PVC connector kits and look in the description for a list of everything included.
Most of the time, the Black PVC is associated with "Furniture".

 

[EmmaDonovan]

Everything is a "Doohicky".
(Sorry)

 

[Sic]

A standard T pipe connector/T clamp - hardware store, Amazon, etc

 

[Sic]

Here's a link
https://www.amazon.com/Clamp-Connector-Stainless-Clamps-Thickness/dp/B0BTRMTKB7/ref=mp_s_a_1_2_sspa