Shape:Toroid(ring)Type:Toroidal Ferrite CoreRange of size:OD:3.5-36mm,ID:1.8-23mm,HT:2-23mmFrequency:High frequencyPurpose:Suppression EMI, including noise and spike noise on the power line, It also has the ability to absorb static pulse,make the electronic equipment to achieve electromagnetic compatibility (EMI / EMC) and electrostatic discharge corresponding to international standards, the use may be more than one multi-core cable or a bundle of cables through shares therein. More turns will  strengthen its effectiveness.Sample time:8-20daysGeneral material:F2 ,F9Magnetism:Non-magnetic