That's what it should be, a standard extension. It includes screws and is made of heavy duty galvanized steel. As always, watch out for sharp edges (like any other box).
Zulkit 5Pcs Black ABS Plastic Project Boxes - Ideal For Electrical And Power Junctions (80 X 50 X 21 Mm)
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๐ก Hydrofarm Quantum QT400 Dimmable Ballast for 400W Grow Lights
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Wireless Electronic Ballast Interface Certified
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