A4 sheet - 297mm x 210mm x 0.85mm thick. Magnetic on one side only with a striped north-south magnetic field to give a secure grip. Black laminated PVC on the non-magnetic side. Each magnetic sheet has a pulling force of 40g/cm2. Made from non-toxic, environmentally friendly EN71 material. These MagFlex sheets are not suitable for sticking 'hard' permanent magnets to as the strong magnetic field will realign the magnetic particles in the sheet, significantly weakening its own magnetic field. If you are looking for a flexible sheet to create a magnetic surface for 'hard' magnets, then you should use our ferrous sheet and tapes.