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ELEGRP NEMA L6-20R Locking Plug Connector, Generator Twist Lock Adapter Male Female Connector, 20 Amp 250V 2 Pole 3 Wire Grounding, Industrial Grade Heavy Duty, UL Listed (1 Set, Black/White) - - Amazon.com
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NEMA L6-30P Twist Lock Electrical Plug 30 Amp 250 Volt 2 Pole 3 Wire 2P 3W Industrial Grade Locking Male Plug Connector Adapter Grounding for Generator, Transfer Switches RV Trailer, UL Listed - Walmart.com
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