Material: This treadmill speed sensors line is made of plastic, ensuring durability and long term use. Compatibility: The product includes a 3Pin light speed sensors line or a 2Pin magnetic speed sensors line(OPTIONAL), making it suitable for various treadmill models. Functionality: It serves as an essential part of the treadmill that helps in accurately measuring the speed while running or walking on the machine. Easy Installation: The treadmill accessory is easy to install, making it convenient for users to replace their old or damaged parts without professional help. Reliable Performance: With its sensitivity and precision, this treadmill speed sensors line ensures reliable performance for your workout sessions. Size Chart: 3Pin light speed sensor: 31cm/12.20inch Package Includes: 3Pin treadmills light speed sensor Note: Please allow slightly errors due to manual measurement and different monitors.