They are made with resistant, ultra light aluminum. We offer 4 sizes: small, medium & large to ensure your comfort, according to your height. Its height can be adjusted. Manufactured with stainless aluminum, you can buy it or rented in Handicap Travelers DR During Your vacation in punta Cana or Dominican Republic. check online or call usto our office located in Punta Cana or Puerto Plata at 1-809-552-8709 to make sure we can accommodate your needs ahead of time.