the external diameter of the pipe is 7mm
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1/2 inch thermowell Stainless Steel 304 with Plastic Cap for Beer fermenter ds18b20 pt100 Homebrew Boiler 30 50 100 150 200 300 400 500mm ( 50mm) : Home & Kitchen
1/2 inch ds18b20 Temperature Sensor Probe with thermowell Stainless Steel 304 for Beer fermenter Homebrew Boiler 30mm 50mm 100mm 150mm 200mm 400mm 500mm (50mm) - Yahoo Shopping
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10mm ⌀ - 1/2 inch thermowell weldless Stainless Steel 304 for Beer fermenter ds18b20 pt100 Homebrew Boiler 30 50 100 150 200 300 400 500mm (30mm)
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