Cal Test Electronics CT3887 4mm Sheathed Banana Jacks accept sheathed or standard banana plugs. These banana jacks offer a ø2mm x 12mm short pin termination for soldering to a wire or onto a PCB. The CT3887 banana jacks can be press-fit into both plastic and metal panels. The Cal Test Electronics CT3887 4mm Sheathed Banana Jacks are 1000V CAT IV rated and available in nine colors.