coil inductors for different use with certificates of UL,CE,ROHS,SGS.welcome to contact us for more information 1) Universal purpose2) Reliable safety approvals3) Low profile and low weight4) Low no-load losses5) Low stray magnetic field6) Low operating temperaturecoil inductor/choke coil/toroid inductor mainly used in PCB,acoustics ,power supply,STB and other. coil inductor