Several items are listed by the U. S. Postal Service as non-mailable in envelopes:
• paper clips
• metal pieces
• glass, chips
• sand
These can jam or damage the mailing machines and can cause serious injury to Mail Center and Postal employees.
To where exactly?
Staple.
The paper clip was not discovered. It was invented.
The paper clip clings to the the magnet
A red paper clip
There are only one property of a paper clip. The property to a paper clip is the testing.
The paper clip inventor is John Vaaler
A metal paper clip will conduct electricity.
The capacity of a paper clip is milligrams positive
Paper clip APEX
Binder Clip or Paper Clip or a Staple.
you mean email? if you mean that, yes. if you mean PAPER LETTER mail, yes still.