10 metres of 20mm wide x 1.5mm thick Magnetic Tape with Premium Self Adhesive - Multi polarity which means it will stick to itself. The tape is 1.5mm thick and is magnetised with a striped magnetic field ( 3mm pole pitch ) to give a secure grip on steel surfaces. These Magnets do not require any protective plating. This tape is held in place by the Premium Tesa 4965 Self Adhesive and has a maximum operating temperature of 71 degrees C. Magnetic Tape is a permanent flexible magnetic extrusion with a high quality self adhesive laminated onto the back or non magnetic face. It is manufactured by mixing ferrite powder with synthetic rubber or plastic (CPE or NBR). This product is lead free using strontium ferrite (Sr0.6Fe203). This type of magnet has the best flexibility characteristics of any permanent magnetic material. It can be easily folded and twisted without damaging the magnetic property of the magnet.