... : Neodimium, Ferrite4. Spearker: 15mm, 27mm, 30mm, 40mm5. Pin: single pin, double pinCompany instructionJIANGYIN LIKN INDUSTRY CO.,LTD is a special inflight ... in LIKNCO's always consideration on research and development. Our company is located in Jiangyin, which is near Shanghai, the logistic ...