Airgoesin EKG ECG Calipers Nursing or Doctor Caliper Divider for Measuring Drafting Electrocardiographs with Ruler (Blue);

EKG ECG Caliper to measure electrocardiogram wave sections. High Quality!
Adjustable screws for arms loose and tight.
Brass arms with chrome-plated feels heavier than other materials.
A circular dent in arms for easy use and elegance.
Protective plastic cover, 6cm/2.4 inches molded ruler for easy reference.
Hardened steel points can be adjustable.
Clip to hold it on your uniform easy to carry.
Length: 11.1cm/4.37inches (from top to points).
Listing is for 1 piece - Blue.