This Tar-Hong Rice Warmer requires no electricity and is unencumbered by moving parts. Stainless steel construction and state-of-the-art insulation ensures that rice stays warm throughout service. These rice warmers have a 40 or 60 cup capacity, making it ideal for busy restaurants and catering operations. Without cords or the need for electricity, these warmers stack conveniently and are NSF-approved. For optimum performance, we recommend using these warmers with a rice net to prevent sticking and allow for easy transportation.