AMP 200277-2 NIM BIN Connector 50 Position 3.81MM
New - old stock, genuine quality AMP (Tyco) brand connector, part number 200277-2.
These are unused, perfectly usable connectors. The white stuff on them is tape residue. Apparently they were taped together in storage and residue of that tape is still adhered to the connector. Rather than take the time to clean each one and having to charge more, they are priced low and giving you the option of cleaning them.
Sorry, connector pins and other hardware is not included.