Please use magnetic tapes with a thickness of 1.2 mm or more as shown on this page. If thinner than this, the magnetic force may be insufficient. If the magnetic force is still not enough even if it is more than 1.2 mm, please strengthen it by overlapping about 3 sheets of tape. Basically, the side without tape has more magnetic force. I often use 2. Please refer to the website link for detailed features and prices.

1)
Website：Product page
Brand：DAISO
Name：Magnetic tape
Number：4549131587487
Size：W – 10mm, L – 3m, T – 1.2mm
Material：Rubber Magnet
Feature：Single sided adhesive type

2)
Website：No online store
Brand：SERIA
Name：Strong anisotropic magnetic tape
Number：649-MGT
Size：W – 20mm, L – 1m, T – 1.2mm
Material：Magnetic sheet
Feature：Single sided adhesive type

3)
Website：No online store
Brand：SERIA
Name：Single sided adhesive magnetic tape
Number：32-729
Size：W – 20mm, L – 1.5m, T – 1.2mm
Material：Rubber Magnet
Feature：Single sided adhesive type