... ,light weight, High frequency and medium frequency induction heater:SpecificationsInduction Heater,MOSFET inversion technology based LC series circuit ,Can ... steel flat base, aluminum sheet and tubular electric heating elements of various forms.4, Annealing (tempering and modulation) ... steel tube, tableware and cup,• Annealing of various other metal work pieces, such as golfball head, cue, brass lock ...