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What are the differences between the RU3040D400CK and RU3040D400FK Combination Service Entrance Device All-in-Ones?

The RU3040D400CK is a surface mount device, convertible to semi-flush with a field installed FK400 flange kit (ordered separately). The RU3040D400FK is electrically equivalent, but is a semi-flush mount device only, with the semi-flush top endwall factory installed and sidewall flanges factory included.

CTA-ID : 2031652
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