United Concept TrainersElectrical Training Aids StoreFREE SHIPPING CONTINENTAL UNITED STATES!Select a CategoryElectrical Training Aids – 5-Circuit Training Aid – Single Circuit Training Aids – Voltage Drop Demonstrator – Ohms Box DemonstratorSpare PartsSubmit Purchase Order 5-Circuit Training Aid $2,995.00 NPN Transistor Circuit $795.00 PNP Transistor Circuit $795.00 Heater Circuit Electrical Training Aid $795.00 Horn Circuit Electrical Training Aid $795.00 Cooling Fan Circuit Electrical Training Aid $795.00 Parallel Circuit Electrical Training Aid $795.00 Series Circuit Electrical Training Aid $795.00 Voltage Drop Demonstrator Training Aid $495.00 Ohms Box Training Aid (Set of 5 Unique Boxes) $495.00 Relay (Prior to 2014) $25.00 Miniature Lamp Replacement Bulbs (10-pack) $25.00