Edge protectors/corner boards -- what classification?

What classification are people using for edge protectors? They’re basically laminated cardboard.

We considered laminated corner protectors / edge protectors to be 25_PF17P in our reporting.

I think we did too (it’s a bit of a blur!)
Then counted as a plastic component, as well?

Yes, the plastic laminate hurts recyclability compared to non laminated paperboard.