ECG caliper: you will receive a black EKG caliper with protective cover, which is suitable suitable for ECG mapping, which is a perfect suitable for schools and hospitalsHigh-quality material: The ECG caliper measuring tool is made of high-quality material, and not easy to bend or desuitable form, providing you with long-term serviceWith scale: there is a scale design on the protective cover, which is used suitable for measuring reference. The measuring range is 0-6cm/0-2.4 inches, bringing convenient use experienceEasy to use: These calipers can be adjusted to the required length to meet needs. The appearance can be stored and carried anywhere you likeWide application: EKG calipers are suitable suitable for nurses, students and doctors, and can be used to measure results and data to meet your daily measurement needscolor:BlackMaterial:MetalPackage Contents:1 x EKG CaliperOnly the above package content, other products are not included.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.