1.there are Six different types of products,you can choose
what you like.
2.If you want to use the installtion method one,please leave
us a message for the size of the chair . If there is no message, we will send you type B
fixed clips, thanks for your understanding.
3.The product A and C can be lifted up and down and the
headrest can be turned over. But B only can be lifted up
4.This product can relieve your cervical pressure.
5.Due to manual measurement, there may be an
error, please understand.Thank you.