A home drum roasterA roaster with a rotating drum that provides agitation to the beans, while a heating element (typically either electric or gas) provides heat. The metal drum conducts heat... with a 9 oz capacity, adjustable heat and airflow profiling, and an external cooling tray. The hot top looks most like a miniature shop roaster such as a Probat or a Diedrich roaster. The external cooling function is unique among coffee roasters.