Plastic Goniometer - Rulongmeter Style - 360 Degree Head - 6 inch Arms:
Transparent plastic goniometer permits observation of joint's
axis of motion, and its range of motion.
The 360° head has three scales calibrated to be used with the
ISOM (International Standards of Measurement, STFR) system.
Arm has a linear scale in inches and centimeters and remains at
measurement position until reset. Angle scale reads 1° increments
x 0.1" x 1.75"