3Pcs 6/8/10inch 360 Degree Protractor Angle Medical Ruler Spinal Goniometer

1、These medical rulers are made of high quality plastic lightweight and durable. 2、The rotatable straight ruler has a center line through the angle plate easy to measure and read angle. 3、The semitransparent design makes it more convenient to read angle. 4、Designed to measure the range of motion in the joints. 5、Specially designed for medical measurement.