With good materials, you can use it with confidence. Lightweight & Portable: Our treadmill magnet safety key is small and lightweight, and can be put into a bag and taken to the gym. It can be easily clipped to any part of your clothes and will not hinder you when exercising. Practical Tools: Safety key failure may cause your treadmill to fail to start or the system power supply to be unstable, so the treadmill safety key can be a great supplement for your treadmill. Warm Tips: Our treadmill magnet safety key is suitable for most treadmills. Due to the size, we cannot guarantee that it is suitable for all treadmills. Please confirm whether the size meets your needs before purchasing to avoid unnecessary trouble. Colour:Red Material:pvc size: 2.8x2.5x1cm Package Contents: 1 set * Magnet safety key Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.