HPA pump coupler dust cap.
thingiverse
This dust cap fits the quick coupler of my high-pressure air pump for my air rifle, protecting seals from dust that could cause issues. It's a standard 1/8 HPA female coupler found on paintball guns and PCP air rifle pumps. Made of stretchable 618 Taulman nylon, printed at 240°C, the material ensures a secure fit. Visit www.taulman3d.com for more info.
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