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Polar T31 Coded Chest Transmitter and Elastic Strap - Black : Heart Rate Monitors : Sports & Outdoors - Amazon.com
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Amazon.com : POLAR T31 Replacement Elastic Strap (X-Small), Black : Heart Rate Monitors : Sports & Outdoors
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Polar Replacement Elastic Strap for T-Series Transmitters (T31 strap) - Medium 25-54 Inches (6.3-137 cm) - Walmart.com
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