Is my new Dell Slim Desktop Model: ECS1250 an Inspiron?

Just about to set up my new PC, but the Help manuals. Dell ask me to select from do not include Slim. So which one should I select? I am aware that the Windows setup won't differ between machines. I'm more interested in hardware side. I think its pretty poor for Dell to send me an email with a link to how to set it up  when none of the choices appear to deal with my particular machine.

Thanks in advance for any help you can give.