Silit Passion 7-1/2 Quart Wok with Lid, Crazy Yellow Extra sturdy steel core provides optimal heat distribution and energy conservation Interior features ultra hard, scratch-resistant smooth ceramic surface; Nickel-free and anti-bacterial Extremely durable and hygienic steel ceramic exterior; Tests have proven colors will not fade even after 1000 cycles in the dishwasher High quality tempered glass lids ideal for low water, energy-saving, and full-view cooking Modern, ergonomically designed all-metal handles are heat insulating and oven proof