This LOT is one piece of New (unused, but without original package) Weinschel 3dB Fixed Attenuator DC-12.4GHz 2W 50 Ohm with SMA Connectors. Part Number: 3M-3. 

Data sheet for 3M/4M Series Fixed Attenuator:

http://weinschel.apitech.com/weinschel/pdfiles/wmod3&4m.pdf