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The Crouse Hinds TP550 is a steel extension ring designed for use with a four and eleven-sixteenths inch square steel outlet box. The extension ring has a depth of one and a half inches and is constructed from durable steel. It measures four and eleven-sixteenths inches by four and eleven-sixteenths inches with a capacity of twenty-nine point five cubic inches. This square extension ring includes eight half-inch and four three-quarter inch knockouts, providing flexible connection options. A fixture bar hanger is built in, allowing for versatile placement along the length of the bar, making installation easier.
This extension ring is ideal for when extra cubic inch capacity is necessary, especially in exposed work applications where easy access and installation of electrical devices such as switches, receptacles, fans, and lights is needed.
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