spawnicon:SetModel(model,skin,BODYGROUP) what a third argument?

what the third argument must specify what would look like in spawnicon spawnmenu?
If the third argument does not establish that looks different spawnicon

spawnicon:SetModel(model string, skin int, bodyground string)

http://upload.akusherstvo.ru/image514130.png

P.S. Sorry for my English

[editline]20th May 2013[/editline]

shit, I’m dumb