Check the listing for details. 16 STRAND Black B-50 DACRON AMO LENGTH REPLACEMENT LONGBOW BOWSTRING STRINGS. Condition: New. Listed at 8.99 USD. AMO LENGTH STRINGSTraditional Premium B-50 Dacron Longbow BowstringSmaller Loop Sizes For LongbowsBeautiful premium quality USA made replacement longbow bowstring. 16 STRAND ( FOR BOWS UP TO 65 LBS )AMO LENGTH STRING From The Archery Hunting Antlers Taxidermy Ebay Supply StorePremium Double Loop Bow Strings*MADE IN USA PREMIUM QUALITY****All lengths are listed in AMO STRING LENGTH and their respective ACTUAL Length is also shown***Available in the following sizes64" AMO LENGTH = 61" ACTUAL LENGTH66" AMO LENGTH = 63" ACTUAL LENGTH68" AMO LENGTH = 65" ACTUAL LENGTH B-50 string material is easier on the bow limb tips with more stretch. Center served with #4 nylon serving.COLOR : Black HOW TO MEASUREMeasure the bow string that you currently have and round up to the nearest full inch. B-50 Dacron strings will stretch a bit as they are broken in. If you DO NOT know the length of your bow string a good rule of thumb is that a longbow will take a string 3" shorter than they are marked and a recurve bow generally takes a 3"- 4" shorter bow string. So, if your bow is a recurve and has marking such as AMO 66" or 66" AMO , you would purchase a 66" AMO Length string, that string would have a physical actual length of approximately 62.5" out of the package and stretch to 63" when it is strung onto the bow.IF YOU ARE UNSURE TRY A INTERNET SEARCH, THERE IS LOTS OF GREAT INFORMATION AVAILABLE ON HOW TO PROPERLY MEASURE FOR THE CORRECT BOWSTRING