Nanocrystalline C core is upgrade product of amorphous c core, with high saturation flux density, low coercivity, low core loss, very low noise, higher frequency up to 20KHz, suitable for main power transformer, audio transformer, output inductor, boost PFC choke coil. Can replace ferrite cores, permalloy cores, silicon steel cores. Dimensions can be custom-made. Acceptance: OEM/ODM, Trade, Wholesale, Regional Agency, Payment: T/T, PayPal We have three own factories in China. Among many trading companies, we are your best choice and your absolutely reliable business partner. Sample is Free & Available