Inner Lid Pressure Cooker with ISI marked. Product name ID Plecan Pressure Cooker. Aluminium body made of wrought Aluminium conforming with IS-21.Aluminium lid made of 2mm/3.25mm thick, 1/2 hard 35 Alloyes conforming with I.S.-20 or I.S.-21. Size in Liters (1 Liters to 60 Liters).