Fabrication Enterprises, Goniometer Baseline Plastic 12 Inch Arm Length 1° Increments Inches and Centimeters, Count of 1Product Description Transparent plastic goniometer permits observation of joints 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) system Arms have a linear scale in inches and centimeters Goniometer arm remains at measurement position until reset Angle scale reads in 1 increments Product Benefits Ingredients Suggestions Special Note Warnings California