BuildTak Polyetherimide (PEI) Print Surface. Now you can choose the print surface best-suited to the material being printed.
Slightly less model adhesion than the original BuildTak, it is recommended where consistant prints are required, but a bit easier to remove the print, such as large and PETG prints.
This size fits the CR-10 S5 bed. It can be easily trimmed to size/shape wth a knife or scissors