Found 2 3D-models for “ball whistle” across many websites

#Trillerpfeife#inside#ball#3dprintable#3Dmodel#3d-print-ka#outdoors#referee#direct#hollow
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Whistle with hollow BALL inside. Just free the ball and it works. Pfeife, Trillerpfeife. Up to 110dB

Whistle with hollow BALL inside. Just free the ball and it works. Pfeife, Trillerpfeife. Up to 110dB

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Ball Whistle

Ball Whistle

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