Metal post. Beware of robotic termites.
The item id for Post Metal in unturned is 449. You can use this ID with the commands below to spawn the item, give it to a player or buy it on a modded economy server.
Useable: Structure
Construct: Post
Size_X: 1
Size_Y: 2
Size_Z: 0.475
Health: 1100
Range: 8
Explosion: 36
Blueprints: 1
Blueprint_0_Type: Structure
Blueprint_0_Supplies: 1
Blueprint_0_Supply_0_ID: 68
Blueprint_0_Supply_0_Amount: 3
Blueprint_0_Products: 2
Blueprint_0_Level: 2
Blueprint_0_Skill: Craft
Blueprint_0_Build: 27
PlacementAudioClip: Sounds/MetalPlacement.mp3
Has_Clip_Prefab: false