This is a round treadmill universal magnet replacement safety key.Compatible with following Treadmills including Proform Image Weslo Cadence ReebokEpic Golds Gym Lifestyler IconReebok Freemotion and Healthrider. Fits most models from Alliance Pacemaster Fitness Gear HorizonVisionTrueSportcraft Bowflex Landice Lifespan Livestrong Merit Pathfinder Smooth Sole Sunny Tempo Triumph and Xterra.Specification:Product Name: Treadmill Safety KeyMaterial: ABSBlackWeight: 0.8 ozClip Size: 1.6in * 1.1 in/4cm * 2.8cmShell Diameter of magnet: 1.2 in/3cmDiameter of magnet: 0.35in/0.9cmNylon RopeLength: 3 Feet/1MRedWeight:0.6 ozClip Size: 2.2in * 1.1 in/5.8cm * 2.8cmNylon RopeLength: 3 Feet/1MPackage Includes:1 x Treadmill Universal Magnet Safety KeyNote：1.This universal treadmill safety key is suitable for almost 99% of treadmills. For size reasons we cant guarantee that it is suitable for all treadmills. If there is any incompatibility please contact us and we will give you timely service. Or please consult us before purchasing.2.The magnet ends are mounted on the magnets of the treadmill. Different treadmills may have different safety key installation positions.