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Amazon.com: RLECS 2pcs DC 5.5x2.1mm Male to Male Power Plug Connector & 2pcs DC 5.5x2.1mm Female to Female Power Jack Connector Adapter for CCTV : Electronics
3/4 in. GHT Solid Brass Quick Connector Garden Hose Fitting (2-Sets) B07T5KRSPH - The Home Depot