The Service Ideas RO117BL Sizzle Thermal Platter Underliner is designed for optimal performance with the Thermo-PlateĀ® system. This oval platter base measures 13-3/4 inches and is compatible with models RO117SS and RO117AL. Featuring convenient handles for easy transport, it is stackable for efficient storage. The underliner is crafted from durable black polyester and includes dead air space to enhance temperature retention, ensuring your dishes stay warm longer. It is dishwasher safe for effortless cleaning. Each unit is sold individually, with 12 units per case. Made in the USA.