Southwire
4" square single device rings are used with 4" square boxes to mount switches, receptacles and devices.
American Granby HSSW3 Heat Shrink Kit STD WL Blk 3WR
Teddico One Gang Outlet Box with 3 Threaded Outlets
Eaton Cooper Wiring Residential Grade Duplex Receptacle 15A, 125V White
Forney 50A Surface Mount Black 6-50R Pin-Type Welder Power Outlet
Makita 40V max XGT® Rapid Optimum Charger