<p>Package Includes: You will receive a EKG caliper and 1 transparent ECG ruler, suitable for electrocardiogram drawing, which is a nice supply for school and hospital</p> <p>Quality Material: ECG caliper is made of quality stainless steel material, and the ECG ruler is made of plastic, reliable and strong, not easy to rust or deform, you for a long time</p> <p>Ruler Design: There is a scale design on the protective cover and the measurement range is 0-6cm\/0-2.4 inch. EKG ruler measures . 24cm\/9.4inch in length, perfect for measurement reference</p> <p>Portable to Use: EKG caliper measuring tool can adjust to the desired length to meet your needs, the compact appearance can be stored and carried anywhere you like</p> <p>Wide Application: The EKG caliper measuring tool ia great for nurses, students and doctors, which can be applied to measure the proper result and data, a practical gift for them</p> <p>The EKG caliper pen has a plastic clip that can be easily fixed to the nursing uniform, and small size also can fit pockets and pencil cases well, easy to carry and use anytime, anywhere!</p> <p>Product name: EKG Calipers and EKG Ruler Combination Set</p> <p>Size: 1.7x11.4cm\/0.7x4.5inch</p> <p>Ruler: length: 24cm\/9.4inch, width: 5cm\/2.0inch, thickness 0.12cm\/0.05inch</p> <p>Colour:As Shown</p> <p>Material:plastic</p> <p>Package Contents:</p> <p>1 set x ECG Caliper Measuring Tool</p> <p>Only the above package content, other products are not included.</p> <p>Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +\/- 1-3cm.</p>