Combi steamer typically contain food racks and the models all hold the same amount and they are typically removable.
Different models can hold different numbers of racks; typical sizes include 6, 10, 20, 24, and 40 racks. 
Units with six or ten racks are usually tabletop devices, while those with 20, 24 and 40 are free-standing. 
The number of racks may also vary from unit to unit, as they are typically removable and can also be replaced with racks corresponding to gastronorm (GR) roasting pan or baking tray dimensions. 
