N2O NOS Cracker Nitro

Easy in use N2O cracker. Very safe. No gloves required (tho, it's better to use them while doing it first time).

You only need ~15,5mm screw. I used both 2,5mm and 3mm diameter. Just screw it through the little conical hole.
You can also use hot glue for additional seal, and put “cap” to make it more *visually appealing*, but from my experience, the cap is too small and it just pop out along with glue after some time. Even without it, seal is tight and gas don't escape through screw.
But yeah, better safe than sorry :D

As for an o ring just cut down balloon ring and it'll work just fine :)
 

Print setting:

• 3-4 parameters, same goes for top/bottom
• 0.16-0.2 layer height
• I had to use brim while printing body
• 50% or more infill, cubic works fine
  
   

Have fun and stay safe! ♥