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AstrHori AH-M1 Light Meter,Real-time External Light Meter with Cold Shoe 066'' OLED Display Wide Range of ISO/F/Shutter Camera Light Meter for Photography Older Camera (Light Meter II Black Brass)
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PUL FACTORY 6020A Waterproof Hand Held PH Meter with ATC and External Electrode, 0~14ph Range
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