BROWNELL DIAMONDBACK SERVING BLACK/ GREEN .018 Brownell Diamondback braided serving material is a quality serving that is easy to work with and is used by archers around the world. Designed for all bow strings, whether Flemish twist or endless loop. Since it has a higher polyester count than Spectra, it offers a superior grip on the string and is long wearing. Diamondback serving is long lasting and the unique braided HMPE (High Modulus Polyethylene) and polyester construction gives superior grip and lays flat for extra tight serves and stays put and will not unravel and will not separate. The diamondback serving works great when you are using a loop on your center serving but is also suitable for end serving, around cams and wheels.