This 5 ply, heavy gauge wok is made up of 2 stainless steel outer layers and 3 aluminum and aluminum flux inner layers to conduct heat evenly. Phenolic handles are heat-resistant. Perfect for steaming: has a dome lid with steam control knob to release steam. Black, stay-cool, phenolic handle and helper handle. A round, capsulated bottom for even heat distribution (note: photo shows flat bottom; no longer available). 14 inches in diameter, approximately 4-1/2 inches deep.