These 14 strand B-50 bow strings feature an endless loop design makes them slightly faster than a Flemish twist, and the end loops are served with braided nylon for longevity. Made of B-50 Dacron string material, the center is served with bonded nylon for abrasion resistance. Note: Order by Bow AMO length not string length. Available in 63" (for 66" model bow) or 65" (for 68" model bow).