2 models, one has a hole in it for if you want to run some rope or wire through it to attach it to the jug itself. the other one doesn't. unless your using a specific filament that can withstand the chemical properties of gas, don't let the tool come in contact with the gas. PLA for example shouldn't touch the gas, more info here. I print mine with 6 walls and 25% infill.
The author marked this model as their own original creation.