With tracheotomy opening for extraction and rehabilitation. X-ray, MRI, CT penetrable. 4 Geared height adjustment mechanism for maximum support of upper cervical spine. Eases pain on neck and shoulder at one time. Easy to use for neck support at home. Polyethylene soft foam lining for easy application and comfort. Relieves the neck pain and stiffness from daily activities, such as living, studying or working at desk all day, and indoor and outdoor sports. Specification: Material: Plastic Foam Product Color: Blue Size: 48x13.2x1cm/19x5.2x0.4inch(for Children) 55.5x16x1cm/22x6.3x0.4inch(for Adults) Features: 4 Geared, Adjustable, Neck Support, Stable, Comfortable Package Includes: 1 x Neck Traction Device Note: Please allow slightly 0-1cm difference due to manual measurement. Colors can appear different depending on light and how the listing is viewed. Thanks for your understanding and attention. Wish you a pleasant shopping experience!