**This item qualifies for free shipping if you purchase 3 or more separate listings from our Trade Me store. All items that qualify will have the shipping option: Buy 3+ of our items that qualify & pay no shipping. A goniometer is an instrument which measures an axis and range of motion. If a patient or client is suffering from decreased range of motion in a joint (e.g. a knee or elbow), the therapist can use a goniometer to assess what the range of motion is prior to intervention, and then make sure the intervention is working by using the goniometer in subsequent interventions. Dimension - Full Length Approximately 63.4 cm ( Arm length 31.7 cm x 2 ) Circle - 12.7 cm Diameter Thickness - 2.2 mm thickness Material - Plastic - Light weight - Smooth turn/ rotation and not loose - Easy to carry - Great for Large Joint - cm and inch measurement - Rounded corner - not pinching the clients - Perfect for professionals and students - Manufactured in a strong, clear plastic and with International Standards of Measurement System The 360 degree Goniometers are manufactured in a strong, clear plastic and have three scales calibrated with the ISOM - International Standards of Measurement System. NZFitnessgear is a professional online and retail store supplying innovative fitness equipment with over 20 years of experience in the Fitness Industry. *Check out our feedback for 11'000+ happy customers.