The hard anodized models 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 anodising 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.