The Service Ideas OT11BL Sizzle Thermal Platter Underliner is designed for optimal temperature retention and presentation. This 12-1/2" rectangular Thermo-PlateĀ® platter base is compatible with the OT11SS model. Its stackable design allows for efficient storage, while the dead air space enhances heat retention, keeping your dishes warm longer. Made from durable black polyester, this underliner is dishwasher safe for easy cleaning. Each unit is sold individually, with 12 units packed per case.