Item 043250 Kit contains: 1 Surgical Prep Razor, 3 Alcohol Prep Pads, 5 Holter Electrodes, 1 Patient ID Card, 1 Hook-Up Guide, 1 Skin Prep Scrub, 12 Stress Loop Tape, 1 Patient Diary, 2 "AA" Batteries. Item 043272 Kit contains everything above except it has 7 Holter Electrodes instead of 5.