PowerFit PF922033 4-Prong 20-Amp Male Plug Adapter for 30-Amp Female Connector

Champion 25-Foot 30-Amp 250-Volt Generator Power Cord for Manual Transfer Switch (L14-30P to L14-30R)

MPI Tools Nema L14-30 Generator Power Cord 4 Wire 10 Gauge 125/250v 30 Amp 7500 watts (40 Feet)

Kohree 20ft 10 Gauge Heavy Duty Generator Cord, Generator Locking Power Cord L14-30 125/250V 30Amp 7500 Watts with Cord Organizer

BougeRV 40 Feet Nema L14-30 Generator Power Cord Heavy Duty Electric Extension Wire 4 Prong 10 Gauge STW Cable 125/250V 30 Amp 7500 Watts L14-30P / L14-30R

MaxWorks 80841 25 Ft. Heavy Duty 4-Prong Twist Lock 125V/250V 30 Amp L14-30P (Male) L14-30R (Female) Generator Extension Cord, Black and yellow

Houseables Generator Cord, Electric Extension Wire, 4 Prong, 30 Amp, 125-250v, Single, Yellow, 10 Ft, All Rubber, 10 Gauge, Heavy Duty, L14-30, Transfer, Electrical Power Cable, With Locking Switch

Parkworld 884968 L5-30P Male to L14-30R for Home Back Power Transfer Switch or House Panel (Adapter)

Conntek 20601-010 Generator Cord, 10 - Feet,

Miady NEMA L14-30P Generator Plug, 30 Amp 4-Prong Industrial Grade Locking Male Plug Up to 7,500W, Grounding Type/UL listed

PowerFit PF923022 4-Prong 30-Amp Male Plug Adapter for 20-Amp Female Connector