Viking 3-Ply Stainless Cookware Set with black finish exterior features a durable stainless steel interior with aluminum alloy core and aluminum exterior. Features convenient internal volume markings in both US and metric measurements. The ergonomically designed stay-cool copper accent handles are designed for comfort and balance. The vented domed tempered glass lids enhance heat circulation for more even cooking and allow to watch the progress of your meal. The oven safe and induction capable exterior can be used on any cooking surface. The Steamer Insert is designed to fit the 3-quart Sauce Pan.