NB-001, NB-002
- With round burners tips and single needle valves.
- Easy flameout and blackening when firing lead glass tubing
- Will be used seldom in the future
- The single needle walves of NB-002 is smaller
NB-003
- With round burners tips and five needle valves
- Not easy flameout
- Splicing efficiency is high
- The tempreture of flame is high
- Can not blackening when firing lead glass tubing
NB-004
- With round burners tips and club shape needle valves
- Can not blackening when firing lead glass tubing
- Not easy flameout
- The size of flame can adjust
NB-005, NB-006
- With oblong “Fishtail” burners and nine needle valves
- Burning flame is sector and the area of heat is wide
- Can not blackening when burning lead glass tubing
- May be used for splicing max. diameter tube and electrode
- The handle of the torch of NB-006 is longer
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