Steel outer shell
Thick and best PA66 30 flame retardant plastic cover 
Japanese original glow plug，same as original Eberspacher 
6-8m best quality power wire 
Burner--best quality,material and quality same as original Eberspacher  
Best quality motor--Brushless is optional
Best quality PCB board and controller
Fuel pump:best quality,quality same as original Eberspacher,silent fuel pump is optional
Best and thick aluminium heater exchanger
Best quality intake pipe,hot air pipe and exhaust pipe
best quality hot air pipe,hot air outlet,bent connection,fuel tank etc.
3 years guarantee
Can design and produce same as request.