Flexi Pac Reusable Hot Cold Compress 8 x14 cs 12 Doppler Transducers Heart Rate Monitor Meter Color:Yellow Heart Rate Monitor Meter Replacement Caster 3 x 1 1 4 * HD Casters Have Threaded Stem For Extra Security And Safety * All Single Wheel Castes Come With Removable Bolt And Locknut Allowing Disassemlby For Easy Cleaning And Removal Of Build Up Grime Thread Or Anything Else That Your Wheel Picks Up During Normal Usage * This Caster System Will Add Longevity To Your Casters * Swivel: Double Ball Bearing With Hardened Raceways For Extra Strength * Cover: Helps Protect Swivel Bearings * Construction: Heavy Guage Cold Rolled Steel Formed For Strength 8 x 14 Cs 12 * Microwavable to provide soothing heat or after freezer storage provide penetrating cold therapy * Conforms to any body contour at any temperature *Non toxic flexible gel * Can be used as a hot or cold compress *