I bought the same thing from a local hardware store, one made in China, the other somewhere else. It says 3/4 inch on the box but it's 1 inch. Luckily I had a 1" knockout at 3/4 but had to pad it out to get enough pressure. Even if you call someone, what will they do? Open pouch and measure Just make sure you have a 1 inch knockout to use if needed.
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