High performance Recurve Bowstrings made from BCY Material. Fast arrow speed All strings are made using a pre-stretched process that allows pre-twist to length and then served while under 300lb of tension. This virtually eliminates any stretch or ‘settling in’ period, giving increased speed and performance. Centre servings are designed to fit the small groove Easton 88 G-Nock as standard. Available in many different colour options, and in either single or two colours.