Grommets protect cables, and can be used on any 4" trade-size electrical knockout or used on 4-1/2" fan knockouts on Middle Atlantic Products top options. Allows for ganging without using expensive electrical fittings. GK-4G gland grommet blocks dust and helps control airflow.
Round gland grommet fits 3" knockouts in compatible racks
Keeps dust out, but is easily opened for routing cables
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