The beautiful, durable black finish given by 60 micron thick hard anodising has two benefits. It makes the pressure cooker absorb heat faster making it more energy-efficient.The unique pressure regulating system gives you the convenience of finger-tip pressure release and prevents clogging of the steam vent. The double-thick base stays flat, heats evenly and is ideal for light frying before pressure cooking. Suitable for gas, electric, ceramic and halogen cooktops.