EMPI 40 in. Pat dry and coat with talcum powder to keep wires soft and help prevent tangling.safety snap lead wires for Focus ⁄ Respond Select ⁄ Epix VT ⁄ Epix-XL ⁄ Empi Select Replacement of lead wires is not necessary unless a short or break in the wire. Snap Lead Wire Fits 300PV; Epix; Focus; Select Units Twisting the pins in and out of the electrode aids in full insertion and easier removal.