BS Lambda N.E.P. Chain is a Tsubaki BS Lambda chain that has undergone a special surface treatment. The link plates have a special three stage layer applied in order to provide the maximum protection from the operating or environmental conditions. This chain is suitable for use in environments exposed to seawater, acid-rain and other adverse weather conditions. This chain does not contain any chemically hazardous substances such as Hexavalent Chromium, Lead, Cadmium and Mercury as regulated by RoHS.