Steaming is an ideal method of cooking for those who want are health conscious because less nutrients are lost than with boiling. It is also a relatively quick cooking process and gentle to delicate foods such as fish.
The top and the middle pans have perforated bottoms to get the steam from the bottom pan filled with the water.

Specifications

Material : Aluminum
Dimensions :
(Medium) 11" x 11" x 14 1/8" - 93728
(Large) 13" x 13" x 14 1/8" - 91375
Compatible with : Gas Stove, Electric Stove