Calder GmbH is a provider of products and services such as offshore structures, metal,steelwork, prefabricated, for ships,installation services for water turbines and engines,sand traps for water turbines and engines,penstocks for water turbines,water turbine governors or regulators,water turbine blades/vanes,plant and equipment for waterfall exploitation,waterfall lock gates,hydroelectric plant, barge mounted,hydroelectric plant, miniature,waterwheels,water turbines, impulse (pelton wheel etc.),water turbines, reaction (francis, kaplan etc.),water turbines, spiral,water turbines, propeller,water turbines, tubular,micro water turbines, under 100 kw,tidal turbines,motors, hydraulic (water engines).