Seeking Assistance: What Are These Slider Rails Called?

Hello, fellow tech enthusiasts!

I’m currently in the process of upgrading my home computer, adding some hot-swappable components to enhance its functionality. However, I’ve encountered a bit of a challenge – I need help identifying the name of a specific part that I believe is essential for my project.

The component in question is a type of side rail used in many computer cases, but I’m unsure of the exact terminology or even the specific items I need. While I might not require these particular rails, I would greatly appreciate any guidance you could offer.

If you could inform me of the correct name for these slider rails or even direct me to a retailer where I can purchase suitable alternatives, I would be extremely grateful! Your insights would mean a lot as I navigate this upgrade journey.

Thank you in advance for your assistance! 🙏🏽