Legamaster Self Adhesive Magnetic Tape 19.0mm x 3m

Amazon

Magnetic to all steel-based surfaces Turn everyday objects into magnets simply by attaching a strip of this tape Self-Adhesive on one side Permanent magnetic on the other side Magnetic strength approximately 70g/cm². 1.5mm thickness

Zoro Tools

Magnetic tape that is self-adhesive on one side and magnetic on the other side, designed for use on whiteboards and other magnetic surfaces. Magnetic strength is approximately 70 g/cm. Thickness: 1.5 mm 1 roll per pack