This is a case for this label maker: https://he.aliexpress.com/item/1005005192759358.html?spm=a2g0o.order_list.order_list_main.10.6d801802h9xV9X&gatewayAdapt=glo2isr

using a 8mm x 3mm round magnets.

print in place no need for assembly, other then press fit then magnets. 

make sure the polarity is correct!!