Liquid-liquid contacting equipment (mixer-settlers, pulsed columns, centrifugal contactors); and liquid distributors, vapour distributors or liquid collectors designed for such equipment, where all surfaces that come in direct contact with the chemical(s) being processed are made from the following materials: N.B. SEE ALSO II.A2.014 1. Stainless steel. Note: for stainless steel with more than 25 % nickel and 20 % chromium by weight see entry II.A2.014.a