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Amazon.com: Dealmed Adult Standard Nasal Cannula – Straight with 7 ft (2.1m), Soft Green, Cannula Nasal Tubing for Oxygen, Highly Visible, Kink Resistant, Lightweight Tubing (5 Pack) : Health & Household
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How to Convert from Feet to Meter / Feet to Meter conversion / Convert Feet to Meter / ft to m - YouTube
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