So far EXCELLENT in the USA but to mail over seas, they run through a tighter gap and I had a single chip crack before. The guy I sent to has had that happen before to him so it has something to do with the foreign post offices. You can send 2 chips in "STANDARD" envelope with the Safe-t Mailer can go out for the old rate of .44c, a 3rd chip will fit but you have to add extra postage for the 3rd.

I would be interested in selling some if you want to try them 1st. Email me if interested.

Albert