Form ID
Also, for anyone that's using the Script Extender to add items to their inventory, you can use the following command:
TemplateAddTo("769adbf8-d3bf-48f7-8c2b-21fb892b1d33", GetHostCharacter(), 1)
This will add one of these swords to your inventory, and I'm sure that just changing that 1 at the end there will change the amount added.