The Lazer Traditional HP Longbow bow strings utilize modern features and function and still maintains a pure Traditional look. More adjustable than an endless loop, faster than a Flemish twist. The Best of both worlds! Built for today's high performance bows (FastFlight® compatible). Lazer bow strings are pre-stretched for almost instant "shoot-in" time. They offer minimal string noise. Made of 16 strands in 2-bundles of green and bronze Rhino string material. The end loops are black D1 serving and are center served with green crown serving. Do not use Seal tite string wax on these bow strings. Built for today's high performance bows Almost instant "shoot-in" time Minimal string noise. Pre-stretched Only for FastFlight® compatible bows 16 strand, 2-bundles of green and bronze Rhino material from Brownell Loops are black D1 serving, center served with green crown serving Note: Order by string length not bow length, 1" increments. Available in lengths of 56" - 68". Please specify. Measure the bow string you have and round up to the nearest full inch. These strings will stretch a bit as they are broken in. If you don't know the length of your bow string a good rule of thumb is that longbow will take a string 3" shorter than they are marked and a recurve takes a 4" shorter bow string. So, if your bow is a longbow and is marked AMO 62", a 59" bow string should fit. NOTE: High Performance string material is not recommended for all bows. Please check with your bow's manufacturer to see if your bow is rated "Fast Flight compatible." For older bows or ones you cannot confirm are compatible, we recommend B-50 string material.