If you use Optifine, you probably have flickering iron bars, such as the one shown here: https://makeagif.com/i/Cta3iu

This texture pack will fix it and make them better looking.

I completely remade the old texture I uploaded, it's in a higher resolution now, doesn't complain about being outdated, and looks awesome!

Credit to the program blockbench for saving me many hours of work: https://blockbench.net/

The texture pack will complain about being outdated, however it still works.