Hello,
Any thanks for your email,
We do not have hard rigid plastic vertical blind slats,
We do however have PVC fabric so will have a plastic finish,
Please find link to these options below,
https://www.blindsbypost.co.uk/vertical-blinds?material=pvc
I would advise to order samples which you can order up to 8 for free to see the fabric in person before placing the order to ensure happy with the fabric.