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Double Penne safety whistle – A bitonal mod of Penne 2.0
printables · Audio

Double Penne safety whistle – A bitonal mod of Penne 2.0

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by Rain Shinotsu
145 Downloads
32 Likes
0 Makes
2 Kommentare
whistle safety outdoor loudwhistle bitonal
Dual-chamber safety whistle based on the Penne 2.0 design
Category
Audio
Source
Printables
Published
19.02.2026
Updated
19.02.2026

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