The hard anodized models have all the features and benefits of the Hawkins Contura Pressure Cooker in a hard anodised body and stainless steel lid. The beautiful, durable black finish given by 60 micron thick hard anodising has two . 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.