Lead ballast & weights are available from a fraction of a gram through medium sized ballast such as NES 168 for military vessels, to larger projects up to 80 tonnes in one single component.

Calder's Special Products unit, which is ISO 9001-2000 Accredited, produces an enormous variety of products ranging from lead ballast and weights to special castings for X-ray and nuclear shielding, lead alloy anodes, and a wide range of castings, forgings and stampings used by both consumer and industrial manufacturers.

Calder Industrial Materials Limited have over 250 years experience in the manufacture and supply of lead ballast and are part of the Calder Group Limited, the largest producer in Europe of Lead Sheet for building.