NiftyGridZPro allows you to restrict a product grid to products from a specific department. For example, to restrict it to just business cards, you use the shortcode option: department_id="252055618931521092"
Here’s the shortcode used for the grid below:
[niftygridzpro store_or_collection="hightonridley" department_id="252055618931521092" page_size=2
]
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Space picture - Stellar Nursery RCW120 Adult Cloth Face Mask
Galaxies, Stars and Nebulae series: A fantastic face mask design featuring a colour composite image of RCW120 / Gum58. It reveals how an ex... -
Tarantula Nebula Outer Space Picture Adult Cloth Face Mask
Galaxies, Stars and Nebulae series: Hundreds of brilliant blue stars wreathed by warm, glowing clouds appear in this the most detailed view ...
So the next question is, how do you find out what the department id is for the products you want?
Finding the department id
The answer is that Zazzle provides a utility for it. Follow this link and at the very top of the window you’ll see:

(I’ve scrolled up a tad so you can see the context)
Just click “select” and keep navigating until you get to the type of product you want:

When you click “Done”, you’ll be given the department id – just copy it ready for pasting into your shortcode:
You can stop navigating before you get to a specific type of product and that way you’ll get all product types within the department.
That’s all there is to it.