3D Printing PEI Sheet, Spring Steel Plate 310x310mm with PEI+Magnetic Sticker B Surface Printing Hotbed Parts for MEGA X Ender 3 Max CR 10

It is clear that the spring steel top plate will handle very high temperatures. What is the maximum temperature for the flexible magnetic sheet?

can this be used on a sunlu printer?

Does the plate have PEI coating on both sides?

Is the magnetic base included with the pei plate?