3M™ Electrically Conductive Single-Sided Tape CEF-3BV, 1240 mm x 50 m, 1 Roll/Case. 3M™ Electrically Conductive Single-Sided Tape CEF-3BV is a conductive fabric tape that offers excellent grounding performance between substrates and high EMI shielding performance (typically greater than 60 dB at specific frequencies). This single-sided fabric tape consists of a copper/nickel-coated conductive polyester fabric and an acrylic-based electrically conductive pressure sensitive adhesive (CPSA). It offers excellent handling characteristics, is thin in overall construction and allows for easy rework.