All My Custom Items 1.21x | v4.0.zip is a release file of the Minecraft resource pack The New Ultimate Era of Textures - Legacy, made for Minecraft 1.21.4. It was published on December 9, 2024 and is 429.7 MB in size. For the full description, screenshots and every other version, visit the The New Ultimate Era of Textures - Legacy resource pack page.
How to install: Put the .zip into .minecraft/resourcepacks (do not extract it) and enable it under Options → Resource Packs.