1.Bobbin material:bakelite 2.core material: Soft magnetism Ferrite core 3.The connection can be stipulated by customer. ... Ltd. is specialized in producing various specifications of transformer ,power transformer,high-frequency transformer,like RM,PQ,POT,EE,EF,ET,ETD ... components, advanced circuit design, strict quality management system of production, modern production lines to the industry for the ...