EBBQ FF Monofilament Center Serving Served End Loop Compound String Tri-Color Strings are made of D-75 and designed to fit the newer Hoyt and Reflex Bows Color is Black/Brown/Tan and identified in catalog by Tri Turbo Twist Turbo Twist Strings are made of 452X and are Black and Green in color Feature Braided center servings and are identified in catalog by TRBT Zebra Hybrid Bowstrings Zebra Hybrid bowstrings feature patented Z-S Twist technology, which virtually eliminates peep rotation Manufactured with BCY 452x material, Zebra bowstrings are stretch-resistant and extremely durable