TDG Holding Co.,ltd,set up in 1984, specialized in producing every types of soft ferrite cores. our producys can be mainly divided in to 2 series.MnZn, Ni-Zn.our Mn-Zn products have more than 30 kinds of materials as well as 7 kinds of more than 3000specification. and our Ni-Zn products have 17 kinds of materials as well as 16 kinds of the core more than 700specification applicated for the SMD pin core and others required by our customers. our customers spread al over the Asia, America and europe. The small-sized, high-precised and stabilized products are warmly popularized among our customers.