Q: What are the differences between spiral duct machine model FHNR-1400 and type duct machine FHR-16

A:The max diameter of FHR-1600 is 1600mm, while the FHNR-1400 is 1400mm.
FHR-1600: different forming heads were required for different diameters.
FHNR-1400: different forming strips were required for different diameters.
Advantage of FHR-1600: The time for changing and adjusting different forming heads is faster. The duct diameter is more stable. But its price is higher than FHNR-1400.