Anti-interference magnetic ring magnetic pass, also said absorption magnetic ring, and said ferrite magnetic ring, also said anti-interference core, also said magnetic ring magnetic pass, is ferrite magnetic ring series in the of a. General is divided into two species, a is nickel zinc anti-interference magnetic ring, another a is manganese zinc anti-interference magnetic ring. it is electronic circuit in the common of anti-interference components, for high frequency noise has is good of inhibition, General using ferrite material (Mn-Zn) made.