3D printer filaments with carbon, glass, or ceramic fiber

IIRC Microcenter has 3D printers on display and operating for demonstration purposes at the St. Louis Park location.  What filaments are used in them for demonstration?  I understand microcenter sells some filaments that contain carbon fiber.  Have any filaments with either carbon, glass, or ceramic fiber been used in any printers as they sit in the store?
We love seeing what our customers build

Submit photos and a description of your PC to our build showcase

Submit Now
Looking for a little inspiration?

See other custom PC builds and get some ideas for what can be done

View Build Showcase

SAME DAY CUSTOM BUILD SERVICE

If You Can Dream it, We Can Build it.

Services starting at $149.99