This LOT is one piece of New (unused, old stock in original package) Midwest Microwave Low VSWR 16.5dB Fixed Attenuator DC-12.4GHz 2W 50 Ohm with SMA Male to Female Connectors. Part Number: ATT-0452-86-004-02.
Data sheet and some technical info for Midwest Microwave Attenuator:
https://rfbayinc.com/upload/files/data_sheet/att-045x.pdf
https://rfbayinc.com/upload/files/data_sheet/att-029x.pdf