The Hybrid X Replacement String (16290) is specifically designed for the Excalibur Hybrid X crossbow platform; Made from Mercury 2 by BCY, a high-performance string material; Engineered to reduce string settling time, enhancing readiness; Helps improve arrow speed for better downrange performance; Custom-matched to ensure optimal compatibility with Hybrid X systems; Offers greater consistency in shot execution and reliability; Built for durability, making it a solid choice for repeated use; Maintains high energy transfer, preserving crossbow efficiency; Easy to install as a replacement string for regular maintenance; Designed for hunters and shooters who demand peak performance