The 0444164951 is a round cable Snap-its Core can easily accommodate round cables or bundled wires with diameters from 2.5mm to 25.4mm. This assembly is available in 44 ferrite material class to suppress differential or common-mode conducted EMI from 1MHz into the GHz region. The polypropylene case meets the RoHS restriction of hazardous substances and has a flammability rating of UL94V-0. Round cable snap-it assembly is controlled for impedances only. Minimum impedance values are specified for the + marked frequencies. The minimum impedance is typically the listed impedance less 20%. The single turn impedance tests for the material are performed on the 4193A vector impedance analyzer and is suitable for use with cable components.