Magnets Strong NeoFlex® Flexible Neodymium 3M Self-Adhesive Magnetic Strip - 12.7mm NeoFlex Self-Adhesive Neodymium Strip 12mm Wide 5 Metres (supplied as 2 x 2., 5 Metre lengths) , 12., 7mm wide x 0., 85mm thick NeoFlex® 12.7mm Wide Neodymium Strip with 3M™ Adhesive 508g pull force per cm length (400g per cm2) This super strong magnetic strip is perfect for a wide range of projects requiring stronger magnetic pull. NeoFlex magnetic strips utilise a premium 3M™ 9448 self-adhesive on the non-magnetic face that substantially increases in bond strength with natural aging While the initial touch bond strength is enough to keep the grip secure, to ensure the adhesive can withstand the pull strength we recommend allowing between 24 to 32 hours for the adhesive to fully cure. 1/2 Inch Neodymium Flexible Magnet Strip, Magnetic Rubber Tape with 3M Striped North â South magnetic field (3mm pole pitch) , Neodymium magnetic face