TENNIS PRODUCTS: Replace your Eye Coach's worn-out arm. Each arm lasts for about 50,000 hits. Simulator FOR TENNIS: Slide the arm of the simulator into place with the neck bent toward the back. TENNIS PRACTICE EQUIPMENT: See an improvement in on-court tennis skills with only 5 minutes a day. PORTABLE SELF-TRAINING TENNIS Simulator: Practice off-court with no distractions anywhere, anytime. EYE COACH: Trusted tennis training equipment clubs, professionals, and coaches use worldwide. Extend the life of your Eye Coach with this genuine replacement arm. Designed for seamless compatibility and easy installation, simply slide the new arm into place with the neck bent towards the back. Built to withstand rigorous training, each arm lasts for approximately 50,000 hits, ensuring your Eye Coach continues to deliver optimal performance. Trusted by clubs, professionals, and coaches worldwide, this replacement arm helps you maintain peak performance and improve your tennis skills with just 5 minutes of daily practice anytime, anywhere.