Conditional tag for single portfolio post

Hi
I can’t find code for to see my widget only in some portfolio pages.
This:
is_single( ’17’,’18’ )

is only for single post and no for portfolio post. I hope you can help me. I have reviewed the list of tags in http://codex.wordpress.org/Conditional_Tags
but I can not get any work for portfolio items.

https://wordpress.org/plugins/widget-logic/