For hanging fixtures, smoke/fire alarms and other security devices with 3 1/2" (89mm) or 4 1/16" (103mm) mounting centers. Has 1/2" trade size KO. Not for use with fans. White
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cULus Listed Raceway: File E90378 Guide RJTX. Complies with flammability rewuirements of UL-5A. Fittings: File E90377 Guide RJYT. Meets Article 388 of NEC. UL Listed for up to 600V. Meets Section 12-2600 of CEC.