I was experimenting with firecrackers and i discovered that plastics casing do work if u do them good enough…

so this model includes Casing and a Tip with 2.5mm hole for fuses 

(note if the fuse moves or slides thru please glue it with glue gun)

this casing can hold MAX 10G of flash powder or black powder.

Also its really nedded to pour CEMENT OR PLASTER ON THE TIP and it must be touching the casing walls to be sure its tight and airthight.

IF U ARE NOT EXPERIENCED FIRECRACKER MAKER DONT PRINT IT

Also i am not responsible for any failures or missing fingers BE SAFE.

also they are size comparable to those green ones.