This torch insert can be used universally for any kind of straightening work.

Expansion insert acetylene/oxygen with 3 nozzles approx. 75 mm wide
Flash cap acetylene/oxygen with 4 nozzles approx. 100 mm wide
Flash tank acetylene/oxygen with 5 nozzles approx. 150 mm wide
Expansion insert acetylene/oxygen with 5 nozzles* approx. 160/176 mm wide