2X Hinged (snap on) chassis mount ferrite core 50Ohm and 100MHz and 500MHz ID 0.354" diameter (9.00mm) OD 0.787" diameter (20.00mm) length 0.827" (21.00mm). ZCAT EMI ferrite suppression filters in plastic housings are clamped onto cables or wire providing EMI filter functions. This filter from TDK has an easily opened housing with a positive lock is reusable and can be used for any type of EMI and RFI filter application.