3M™ Conductive Cu/Ni Fabric Tape CN3190, 39.37 in x 98.4 ft, Splice Free, Log Roll, 1 Roll/Case. 3M™ EMI Shielding Fabric Tape CN-3190 is a 4.3 mil thick, acrylic adhesive shielding tape. This tape is suitable for applications such as the grounding and EMI shielding of equipment, components and shielded rooms. It comes on a removable liner for easy die cutting and handling.