When purchasing sinks, the gauge of the steel used is very important. The lower the gauge number, the thicker the steel. Soci gives you four grades of steel to choose from, each grade combines chromium and nickel in exactly the right proportions to give each model an exceptional level of durability, hardness and strength. Soci sinks have a high luster satin brushed bowl and offer either a polished or brushed rim. Soci sinks will maintain their beauty, without rust, cracks or stains.