What firework is this

[Pirotecnia]

Do you know if there is some special name for this kind of firework shell? https://www.instagram.com/p/DDAFjCfSMWP/

Thanks

[CountZero]

Is it a double voice crackers? 

https://www.skylighter.com/blogs/how-to-make-fireworks/3-pound-double-voice-crackers

[Pirotecnia]

3 hours ago, CountZero said:

Is it a double voice crackers? 

https://www.skylighter.com/blogs/how-to-make-fireworks/3-pound-double-voice-crackers

thanks! I think you are correct!