I have no idea what these are. They are brand new and I have 2 of them. If you have info on what these are or want to buy them send me a message.

This is what google thinks these are:

The image shows a custom engine block heater kit, likely a "FrostHeater" brand, designed for specific Volkswagen TDI diesel engines. These kits help the engine start quickly and easily in sub-zero conditions.

The item pictured is likely a FrostHeater or similar aftermarket engine coolant heater kit for a diesel vehicle, such as a Volkswagen TDI. These kits circulate heated coolant throughout the engine block for easier cold-weather starts and faster interior heat.

Here are the numbers on the harting connector.

19300061540

86A669R04

M20 Harting Han

Type 4x12 enclosure

Interflex dn17 m20 x 1.5

That’s everything written on these.