Manual Plunger for 30ml cartridges commonly used for phone repair

These syringes full of UV glues have no manual way to dispense the material inside. Instead they want you to buy a gun that costs more than the glue ($15 to $40). That's fine if you are using it to often like to make a living.

So I decided to make a printable simple plunger that makes it work like a normal syringe.