Unique Interchangeable Weight Golf Balls: The Gemini mat includes three golf balls with color-coded weight biases: Green (Light), Red (Medium), Blue (Heavy). These innovative biases enhance practice by allowing the ball to turn as it rolls, offering a tailored training experience. 14ft Professional Putting Surface: Experience the real feel of the golf course with this 14-foot putting mat, perfect for both serious training and casual play. Technical Precision Training: Created to replicate actual golfing conditions, this mat serves as a critical tool for enhancing putting techniques, with the weighted balls adding an extra layer of challenge and realism. Durable and Convenient: Designed with quality materials for longevity, the roll-up design ensures easy setup and storage, letting you practice your golf game wherever you choose. Advanced Golfing Experience at Home: With the Gemini Series Technical Putting Mat, you can adjust the weight biases in the included golf balls, customize your practice, and receive real-time feedback, making it an invaluable addition to any golfer's toolkit.