Kabrel II was the uninhabited second planet in the Kabrel system. The planet was unremarkable aside from some cormaline deposits, though not enough to have warranted mining. (DS9: "Statistical Probabilities")
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According to the script, the pronunciation for Kabrel was "kuh-BRELL". 
The name of the planet was not mentioned in the episode, and was from the Star Trek Encyclopedia (4th ed., vol. 1, p. 398).