Your printer's hot end is comprised of two stages. The beige plastic part is a thermal break between the 200C heater cartridge and the feeding mechanism above.

The job of the beige part is to keep the filament cool before it reaches the heated element.

The part pictured is made with PEEK plastic. http://reprap.org/wiki/PEEK

For more term definitions, see http://reprap.org/wiki/RepRap_Options#Ex...

Anyway, we're here because this thing is jammed. Read on.