This armrest can be adjusted up or down on the chair and also flip up for easy entering and exiting the chair, as well as for easy chair fold and transport. Lower priced poor quality chairs do not offer this option and might have only a fixed height. This might interfere with transfers and might not be at a correct height to provide you with optimal arm support. Our wheelchairs are designed and extensively tested by us, as a result of this extensive testing, our mobility aids meet and in most cases exceed WC19 performance requirements. Made in the USA by Convaid.