Digital Absolute + Axis Goniometer (Built In) Undercast Padding Pantyhose * Antracite * 20 30 Color:Red Pantyhose * Antracite * 20 30 mmHg * Medium * Ankle Circimference 8 3 8 9 7 8 Thigh Circumference 18 1 8 27 1 2 * Hip Circumference 30 50 * Beautifully sheer hosiery Durable long lasting * Sandalfoot styling * Gradient compression for relief and prevention of venous disease * Therapeutically effective sheer lightweight and fashionable * 3 years (1 year for spare parts) from the date of shipment under normal use and service The integral absolute vertical and horizontal levels are permanently incorporated into the digital goniometer arm * Goniometer reads 0 180 degrees on LCD screen * Has ability to freeze angle measurement * Powered by 1 9V battery * Goniometer exterior is powder coated steel with inch cm marks screened onto arms * Digital angle reached in center * Horizontal and vertical levels to indicate level or plumb starting point *