Qc Universal Light Crossbar - 4 Inches Light Fixture Mounting Bracket with Ground Screw and Acorn Cap Nuts for Mount Wall Light, Close to Ceiling Light, Chandelier (2 Pack) - Amazon.com
Bow Hanging Plate Ceiling Rose Canopy Fittings Droplight Led Chandeliers Lighting Fixture Bracket Board Iron Hardware Brackets - Connectors - AliExpress
Ceiling Light Fixture Mounting Bracket [Upgraded Version], Ceiling Fan Mounting Bracket, Universal Light Fixture Parts with Screws, Swivel Junction Box Adapter, Light Fixture Crossbar for Light, Fan - Walmart.com
4 Inch Ceiling Light Fixture Mounting Bracket 6 Sets Light Fixture Crossbar Light Crossbar Steel Crossbar Bracket with Ground Screws and Acorn Cap Nuts [FDXGYH] - Amazon.com
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4.9in (125mm) Crossbar Bracket Kit For 5in Canopies – Brighttia