About this item Recommended for restaurant/commercial use only. 1. 2 mm thick Welded Joints with round bottom. (wok ring necessary for residential customers) Protective coating must be burned off before use. Because of the nature of carbon steel, the wok need to be seasoned each time after cooking. Otherwise it would be rusted. Brand: Material: Metal Special Feature: Heavy Duty Color: Black Capacity: 3 Liters