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Close-up of the teal DELTA-V Lung Trainer, a sturdy plastic whistle with a cylindrical design. It has a concave mouthpiece and textured grip area, featuring an engraved arrow symbol on one side, set against a white background. A person wearing glasses and a dotted polo shirt uses a handheld lung capacity tester, blowing into the mouthpiece while holding the device upright. A framed leaf artwork is visible on the wall in the background.

DELTA-V Lung Trainer

DELTA-V Lung Trainer

$39.99
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