End Portal Frames are rare blocks that form the structure needed to access the End dimension. They are found naturally in strongholds, with a 3x3 square of these frames forming the portal's shape. To activate the portal, each frame must contain an Eye of Ender. Once all eyes are placed, the portal activates, allowing players to enter and confront the Ender Dragon, the game's final boss. These frames cannot be obtained in Survival mode without cheats.
The numerical item ID for End Portal Frame is 120
Numerical item IDs will only work in Minecraft versions below 1.13.
The item ID for End Portal Frame is minecraft:end_portal_frame
This is the spawn command to give yourself End Portal Frame in Minecraft which includes the Minecraft /give command. If you are using the Essentials plugin you will need to use /minecraft:give instead of /give