Economical way to convert open-top 30- and 55-gal. steel drums into fire-safe receptacles for combustible trash. Easily attaches using only a screwdriver and wrench. Easy to remove. Steel with a highly chemical-resistant powder-coat paint finish. Fits drums with 22 1/2″ to 22 3/4″ Dia. Replaceable fusible-link assembly inside cover melts at 165? F to automatically close cover and extinguish flame in the event of a fire in the drum. FM Approved.