EK CRS-120K SPLIT STRING FOR CR-400

EK Archery Hex-400 Replacement Cables,  (CRS-120K)

As a general guide it is recommended practice to replace strings and cables at the same time, especially if you're replacing the string due to a Dry Fire, the only time we would recommend only replacing the string or cables separately is when your string or cables have come in contact with a sharp object that has partially cut through the material.  it's also recommend having the string and or cables fitted to your bow by a trained bow technician