Features: Easy to read: The clear plastic goniometers measurements in inch and centimeters are on the arms of the gonoimeters and are easy to read. Portable to carry: It is easy to carry around, if you're at home recovering, this is also a convenient set to track your progress and mobility. Specifications: Material: plastic Color: transparent Warm note: Manual measurement, please allow slight errors on size. The colors may exist slight difference due to different screens. Package Includes: you will receive one 12-inch 360-degree goniometer; It helps us measure joint range of motion for physical therapy; This goniometer for classroom is ideal for teachers and classroom use, and it can also be used as home equipment 360 Degrees of Coverage: our goniometer physical offer 360 degrees of coverage in 1-degree increments and can be applied on various occasions with 360-degree rotation, various scales can offer a variety of readings Clear Reading: the clear plastic permits observation of the joint's axis of motion and range of motion, you can to place the goniometer knee directly on a joint or limb for easy observation Transparent Sturdy: these range of motion goniometer are made of quality plastic material, tough, sturdy and is designed with transparent color, can clearly observe the range of motion of the joint Widely Apply: 360 degree goniometer which can be applied for measuring the range of joint motion and the angle of the spine, etc.; Goniometer physical can also be applied to the production of architectural drawings and horizontal measurement ASIN B09CLCP5TL Color Transparent Model Frienda-2Angle Ruler-WD3GHH1 Brand Name Frienda Style Name angle ruler Unit Count 1 Count Part Number Frienda-2Angle Ruler-WD3GHH1 Manufacturer Frienda Material Type Plastic Item Highlight Plastic Angle Ruler, Orthopedic Rehab, Sports Training, ROM Measurement, Joint Assessment Number of Items 1 Number of Packs 1 Graduation Range 1/8 inches Item Dimensions L x W 12.4 L x 4.92 W