Cylinder Measuring, Graduated, Material: Borosilicate glass, Class -A glass hexagonal base, with spout, Complete with protective guard, as per ASTM E1272 standard, Blue Graduation, Sub. Div. - 0.5 ml, Tolerance - +/-0.17 ml, Capacity: 25 ml
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 in