The structure of this Durable String is made specially to deliver the best performance; It also features a proprietary center serving which significantly increases string life; Do more shooting and less tuning with Micro/DualFire String; The Micro/DualFire Crossbow String is constructed using the of BCY DynaFlight 97 material to maximize your crossbow's speed and reduce string creep; Be ready for non-stop hunting with Excalibur Archery Accessories; This Versatile Archery Ceasefire Crossbow String is a replacement accessory that will fit all MICRO and DUALFIRE Series Crossbows; Excalibur's archery gear is known for its durability, versatility, and changeability; By choosing Versatile and Durable Excalibur Micro/DualFire Crossbow String you choose the experience and technologies of hunters; Be sure, Crossbow Hunting with Excalibur equipment provides the utmost performance and durability; Available in multiple colors