Laird Technologies 28A Series Ferrite Clamp Filters are split, snap-on cores in plastic cases for broadband EMI filtering. The 28A Series is for round cables and wiring harnesses. For retrofit and post-assembly operations, Laird Technologies offers a selection of "split" cores. Similar in performance to the one piece core designs, the 28A Series Ferrite Clamp Filters split ferrite cores provide excellent common and differential mode EMI suppression on round cable and wire assemblies. Black or white plastic snap-on cases provide secure closure of the split cores onto the cable.