... .supply with matched bobbin 4.ToHs toroid coated ferrite core Description:1.Shape:bar ,ball,strip,stick,coil, block,sheet, ... . µi:(Initial Permeability)400~6004.Cutie Temperature 150~3005. Saturation flux density :4.6~4.7.6.frequency range:0.05 ... ,please visite our website:http://hongqiaoelectron.com toroid coated ferrite core