Double walled, heavy duty with forced air circulation.Temperature 50º C to 150º C/200º C/250º C.Inner chamber : M.S./Aluminum/Stainless steel.Capacity of Tray: 12, 24, 36, 48, 96, 192 Trays.Choice of Tray: Aluminum/Stainless steel.Temp. Control: Thermostatic/Digital Control.It can be supplied in custom-built sizes, specification & with PID Controller or Profile Programmer.