4" Square Steel Junction Box Extension Ring 2-1/8" Deep Metal Device Outlet Box for Residential & Commercial Wiring

4" Square Steel Junction Box Extension Ring 2-1/8" Deep Metal Device Outlet Box for Residential & Commercial Wiring. cETL Certification: Product holds cETL certification ensuring compliance with safety standards. IP66 Waterproof Rating: High protection against dust and water jets for reliable outdoor use. Pre-Galvanized Steel: Durable material with 1.2mm/1.3mm thickness for long-lasting performance. OEM/ODM Support: Full customization services including design, samples, and mass production. 12-Month Warranty: Comprehensive quality guarantee provided for 12 months after shipment. Large Capacity: 30 cubic inch capacity suitable for residential and commercial wiring. Flexible MOQ: Minimum order quantity is just 1 piece, ideal for small orders. Free Samples: Samples are freely supplied including air freight costs for approval.