* EKG Ruler with Seconds Scale for PR, QRS, Cycle Length, Coupling, Escape & Parasysto..
* Designed to measure the range of motion in joints
* Measures a 360° range in single d..
* Pocket-size medical ruler in inches and centimeters
* Wound diameter / pupil dilation ..
Pocket Eye Chart
Ultimate Rosenbaum/Snellen Pocket Size Eye Chart..
6" Opaque Ruler (IN/CM) with Degree, Ounce & Gram Conversions..
8" Protractor Goniometer
* Designed to measure the range of motion in joints.
* Measures a 360° r..