The Stub Airlock
Description
The Stub airlock is an invincible airlock using very little water and 29g of filament at 100% infill with support. It will be waterproof with any filament, it is invincible, it might be overkill, but it will work. With a 40$ 1kg roll of filament the stub cost 1.20 The very small exit hole ensures nothing unwanted enters easily, even without the water an active ferment will push out enough co2 to stop anything. Thick walls ensure rigidity and watertightness even with sub par printers
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