HD-Alien Icons.zip is a release file of the Minecraft resource pack Heroes United: Ben 10 HD Silhouettes, made for Minecraft 1.16.5. It was published on April 20, 2021 and is 0.1 MB in size. For the full description, screenshots and every other version, visit the Heroes United: Ben 10 HD Silhouettes resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.