A lance is presented for introducing fuel into a second burner of a combustion chamber of a gas turbine installation with sequential combustion, having a first and a second combustion chamber. The low glass transition temperature polyimide layer is synthesized by contacting an aromatic dianhydride with a diamine component, the diamine component comprising about 50 to about 90 mole % aliphatic diamine having the structural formula H2N\u2014R\u2014NH2 wherein R is hydrocarbon from C4 to C16. The conductor is connected to a power supply for providing electrical current through linear traces of the conductor that interact with magnetic fields generated by magnets that are mounted to the frame.