This is an aluminum 4.0 litre pressure cooker with a whistling pressure regulator.Easy to open and close: quarter turn is enough New 'whistling' pressure regulator Mirror polished interior and base matt finish Inside fitting lid opens only when pressure falls Stay cool handles Shielded safety valve Long lasting gasket Non-corroding handle bar and lid New improved pressure regulator Unbreakable fixed pivotAssembly Required: No Country of Manufacture: India Depth (Front to Back): 16 Height: 9 Weight: 4 Width (Side To Side): 6