Product name: Adjustable wheelchair headrest Color: red,black,violet Precautions for use: Insert the curved pedestal into the left and right push tubes of the wheelchair, and insert the U shaped pedestal into both the left and right sides of the curved pedestal. Adjust the width to match your head tube size. Insert the head tube into the marble to jump and spin. The U shaped base allows you to adjust the front and back position of the head. Once positioned, lock the knob with the bow base and U shaped base knob. Move the headrest up or down to the appropriate height. Tips: Push the inner tube head directly through the pop up window to take out the inner tube head. Do not delete the U shape. The curved base allows the wheelchair to be folded directly Package includes: 1 x Wheelchair Neck Support with Rear Handle (Excluding Wheelchair) Note: 1. There may be a 1 2cm error from the specified size. 2. Square tubes and flat tubes cannot be installed! (Pay special attention to whether the power wheelchair meets the push hand tube requirements!)Easy to install and use: The headrest angle and headrest height can be adjusted according to the user's actual situation (high back wheelchairs can only adjust the headrest height, the front and headrest cannot be adjusted ) at the rear of the headrest). Very Portable: When you are not using the wheelchair or want to close it, just remove the headrest. Just click the pop up window on the headrest tube, do not remove the bent base. The wheelchair can be folded directly. Flexibility: You can adjust the pillow angle and height according to your needs (high back wheelchairs can only adjust the height of the headrest, but the front and back angle of the headrest cannot be adjusted) Ideal for travel chairs. Scope of application: The diameter of the push tube used for wheelchairs and dining chairs is 22.2 24.5mm, preferably round tubes. Suitable for wheelchairs from 16 inches to 20 inches. (Product does not include wheelchair!). 3D breathable mesh and sponge head pillow, aluminum alloy support. Light and sturdy. Other features: U shaped sponge net pillow, anti back side, can reduce head pressure, highly breathable, light and refreshing.