Patented pre-positioned electrodes. Save time on lead placement up to 70% & procedure time by 30%. Easy & Simple w/-minimal training & fewer errors misplacements. Consistent placements aids in performance of serial comparisons of ECGs overtime. #F01140UNI02003-Sz1 #F01141UNI02003-Sz1 #F01142UNI02003-Sz2 #F01143UNI02003-Sz3 UNSPSC#42181708 For more sizing options https://www.qtmedical.com/en-gb/downloads