ECG caliper measuring tool set: 2 different colors independent coated 2 copper ECG caliper and ECG wave form can be used to measure 2 transparent ECG ruler; Copper ECG caliper pen has a plastic clip that can be easily fixed to the nurse uniform. Adjustable and convenient: Nursing ECG calipers have a total length of 4.5 inches/11.5 cm that are easy to transport in pockets; The needle tip is fixed with screws and the length of 2 needles can be adjusted; 2 corners are fixed with screws outside, which is suitable for adjusting the tightness of 2 corners; The plastic protective cover is a ruler of 2.4 inches/6 cm suitable for reference Light and portable: Meter the ECG ruler approximately. 9.4 inches/24 cm long, the patient monitor defibrillator can be suitable for the rapid ECG measurement on the paper and screen; It is also suitable for routine use and emergency s; It has light and small volume advantages . It is made of large scale transparent plastic with transparent ECG ruge, reliable and protective for longer life; 2 legs of ECG caliper for nurses are made of copper to use, reliable, abrasion resistant and easy to swell. Ekil Foreign Gift: ECG caliper measuring tool for nursing is a practical gift for your friends who are nurses or nursing students.