Features 1、Automatic Protection: The safety lock is an automatic protection device for the treadmill. When the switch is out of the treadmill sensing area, the running opportunity immediately stops working and emits a beep to prevent from falling during the exercise. Specification Item Type: Treadmill Safety Switch Material: ABS, magnet Gross Weight: 31g / 1.1oz Product Size: Rope length: 92cm / 36.2in, magnet shell diameter: 32mm / 1.3in, height: 28mm / 1.1in, magnet diameter 9mm / 0.4in Diameter of a single column: 2mm / 0.1in, distance between two columns: 20mm / 0.8in (The rope is slightly elastic, manual measurement allows error, does not affect the use) Package List 2 x Emergency Stop Switch Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.