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One x 17oz (500ml) Bottle of test fluid for use with item '4500' Tester.
The test fluid changes colour in the presence of CO2. Do not contaminate new fluid by returning used fluid into bottle.
One x 17oz (500ml) Bottle of test fluid for use with item '4500' Tester.
The test fluid changes colour in the presence of CO2. Do not contaminate new fluid by returning used fluid into bottle.