I have purchased two models from this company - one with a long stem and square head that reads up to 60 pounds and another that reads up to 100 pounds with a short stem . and a pressure of 15 degrees. This is lower pressure for my motorcycle and vehicles. The one with the higher pressure is for my caravan tires. While I don't have an "easy" way to check the accuracy, at least they are consistent and the readings seem to agree well with other instruments.
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