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How do I get a Masterpact MP or NW/NT fungus treated?

What suffix or selector option is needed to fungus treat Masterpact circuit breakers?

Product Line:
Masterpact Circuit Breakers

Masterpact circuit breakers comply with T2 tropicalization (IEC Standard 68-2-30); relative humidity 95% at 113F (45C) and 80% at 131F (55C) (hot, humid climate). Salt spray resistance as per IEC 68-2-11.
Additional fungus treatment is not necessary.
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