Free shipping triggered only for certain shipping classes, possible?

Hello! I’m new to Woo-Commerce, so apologies if this is something obvious I’m missing, but I’m wondering if it’s possible with the “free-shipping” setting, to only apply the free shipping for certain shipping classes?

Example being:

– I have a flat rate of $30 set for certain postcodes
– For specific shipping classes in those postcodes, I’ve applied a $10 flat rate instead.

– I would like to set free-shipping for orders over $50, but ONLY for the products in the same specified shipping classes as the $10 flat rate.

Does this make sense and is it possible? Thanks in advance for your guidance!