The hard anodizedmodels have all the features and benefits of the Hawkins Contura Pressure Cooker in a hard anodized body and stainless steel lid. The beautiful, durable black finish given by 60-micron thick hard anodizing has two benefits. It makes the pressure cooker absorb heat faster, making it more energy-efficient. And the pressure cooker stays looking new for years. Recommended for use on gas stoves.