Best and thick aluminium cover body
Japanese original glow plug,same as original Webasto 
Bestquality brushless motor
Burner--best quality,material and quality same as original Webasto
Best quality Water pump 
3 Meters best quality hot water pipe
Fuel pump:best quality,quality same as original Eberspacher,silent fuel pump is optional
1M best quality intake pipe and exhaust pipe
2.5meters wire