BCY 450Plus Bowstring Material Black 1/4 lb. 1694. 450 Plus has a lower filiment count which keeps the fuzziness down. 1/4 pound spool. Single strand breaking strength of 155 pounds. Approximately 1175 feet per 1/4 pound spool. Package Contents: BCY 450Plus Bowstring Material This highly durable blend of HMPE and Vectran will not stretch or creep. 450 Plus has a lower filiment count which keeps the fuzziness down. 1/4 pound spool. Single strand breaking strength of 155 pounds. Approximately 1175 feet per 1/4 pound spool.