Breathable mesh cloth and sponge head pillow, Aluminum Alloy brace, Lightweight and firm.When you dont use it or want to close the wheelchair, you just need to remove the headrest part . Easy to install and use, a Good choice for disabled person Specification: Material: aluminum alloy breathable mesh sponge. Can be used for 16" 20 " seat wide wheelchair, sitting stool. Size: Approx.42.5 x 37 x 10 cm 16.7 x 14.6 x 3.9 inch. Lnstructions for use: Place the curved bases on the left and right push hand tubes of the wheelchair, and insert the U shaped base into the right and left sides of the curved base. Adjust the width to fit the size of the head tube. Insert the head tube to the marbles to jump out and turn. The U shaped base adjusts the front and rear position of the head. After determining the position, lock the knob with the arc base and the knob of the U shaped base move the headrest up and down to a suitable height. Tips: Press directly on the head of the tube on the pop up, pull out the head, do not take off the U shaped and with a curved base, the wheelchair can be directly folded Package Included: 1 x Wheelchair Headrest Neck Support with Back Handle Tube(wheelchairs does not be included)Scope of application: The diameter of the wheelchair push tube should be 22.2 24.5mm, preferably a round tube. Please make sure that the width of the wheelchair push tube is suitable for installing the fixing clip (about 14 inches). Tip: Click directly on the pop up window on the headrest tube, pull out the headrest, and the wheelchair can be folded directly without removing the U shaped and curved base. Easy to install and use: insert the curved base into the left and right push handles of the wheelchair, insert the U shaped base into the left and right sides of the curved base, and then turn the U shaped base to adjust the front and back position of the head. Material: 3D breathable mesh and sponge headrest, aluminum alloy support light and strong. Other functions: U shaped sponge net pillow, anti rollover, can reduce head pressure, more breathable, lighter and more refreshing. Flexibility: The angle and height of the headrest can be adjusted according to needs (high back wheelchairs can only adjust the height of the headrest, not the front and back angle of the headrest) it is very suitable for travel chairs.