Widescreen PF12.1W (164mm x 261.3mm). 

This is for a screen 12.1".

Helps keep on-screen information private.

Computer user sees screen data clearly; from the side, others see a darkened screen.

Easy to attach and remove.

I was given this for my previous laptop but have never used it, so it is in the original packaging even though it looks a bit tatty.

Thanks for looking and happy bidding.