... .ISO9001:2008,ROHs metal stamping AA battery contact springs for PCB 1. Available Material: Phosphor bronze , Iron, cooper, tinplate ect. ... tolerance reach 0.05mm.3. Function: Electric conduction and contaction.4. Size: It's according to customer's drawing.5. ... ,we can provide control plan,showing processing and inspection tooling; 4.Quality control: In house,coming inspection,first off,spotcheck in ...