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What is the catalog number for breaker blanks for I-Line panels?

Issue:
What is the catalog number for breaker blanks for I-line panels?

Product Line:
I-Line Panelboards

Resolution:
HNM1BL is a set of (3) 1.5" filler plates. HNM4BL is a set of (5) 4.5" filler plates.
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