8GB per cufflink so approximate memory is 16GB between the pair. Stated memory is 8GB per cufflink, actual useable memory is between 7-7.29GB. They are magnetised which is how the memory part stays stuck to the host cufflink, they are sturdy and don't come off during regular use. Polished silver tone stainless steel surfaces on the cufflink. Any further inquiries are welcome.
