Ruler Ekg 1/2cycle Scale 1-11/16x6-3/8in, Carton Of 100

Details:

Ekg ruler coupling 1 11/16 x 6 3/8 in^ ekg ruler, features are seconds scale for pr, qrs, cycle, length, coupling, escape, and parasystolic intervals, offers both 1 and 2 cycle scales, small enough to fit in a medical coat pocket, complete with protective sleeve, size: 1 11/16 x 6 3/8 i