This AC WORKS brand Protective Adapter S1450CB520 is a heavy-duty household adapter cable. The NEMA 5-15/20R is a 15/20 Amp T-blade female connector. The cable is an STW 10/3 anti-cold weather cable staying flexible in extreme temperatures. The cord is super durable and typically used with residential generator construction and industrial equipment.

AC Works s1450cb520 1.5ft 50A 4-Prong 14-50P RV/Generator/Range Plug to Household Outlet with 20A Breaker –
$49.59