The PEI sheets used on Lulzbot printer beds are very nice to work with, but can acquire damage over time from prying tools. This is a factory-original replacement.
Polyetherimide work surfaces are apparently the thang. Sticks well, pretty tough, just a bit expensive. Considering how much polyimide tape and hairspray you may buy to assure good prints, this is a pretty good deal!
When cleaned and heated to the recommended temperatures, your print sticks well, the first time and releases from the heated bed once cooled. This LulzBot Mini PEI sheet measures 170 mm by 170 mm. The additional material in width and length to allow users to trim to fit their product. This will also allow for a perfectly aligned and finished edge to match the functional dimension of 150 mm by 150 mm on the LulzBot Mini.
The PEI sheet comes prepared with a self-adhesive layer already applied to make installation quick and easy.