This was a temporary portable thing. Needed GFCI per powered device, each gfci only had an amp or two on it. Besides being less expensive than GFCI breakers we wanted a sort of annunciator panel where the operator could rapidly see a tripped gfci and this served that purpose well. The can was a nema 1 pullbox and the custom cover was lasercut from 14ga steel. The cover cost me around $150 for material and cutting, I spent about an hour in fusion laying it out.