BUILD PLATE - dennislia/Marlin-2-0-x-Anycubic-i3-MEGA-S-Fork GitHub Wiki

PEI Magnetic Spring Steel Surface: Is the solution to the problem when some of the surface has peeled off of the Anycubic Ultrabase Bed. It has the advantage that you can quickly cool down the 3D print and build plate by removing it from the magnetic surface and flushing it with water in the utility sink. It also has the advantage of making it easier to remove the 3D printed item from the surface by flexing the plate.

3D Printer 270x200mm/ 10.6x7.8 inch PEI Sheet【Double Sided Textured/Smooth】Spring Steel Build Plate/Flexible Steel Heated Bed with Magnetic Bottom on Amazon

This is slightly smaller than the 4MAX Pro 2.0 270 x 210mm build plate area.