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Amazon.com: MINIATURE INFRARED DETECTOR/SENSOR UNIT - 1 EACH TRANSMITTER & RECEIVER, 1/2 X 1/4 X 3/8" 12.8 X 7 X 8.8MM : Arts, Crafts & Sewing
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Amazon.com: MINIATURE INFRARED DETECTOR/SENSOR UNIT - 1 EACH TRANSMITTER & RECEIVER, 1/2 X 1/4 X 3/8" 12.8 X 7 X 8.8MM : Arts, Crafts & Sewing
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