The TenPoint TX 440 Replacement String is specifically designed for the TX 440 crossbow, offering high-quality performance and longevity. Made from premium materials, this pre-twisted string ensures consistent accuracy and reliability. It is recommended to replace the string every two years to maintain the crossbow's optimal performance. Easy to install, this replacement string is a crucial component for keeping your TX 440 in top condition. TenPoint TX 440 Replacement String HCA-70321