Material: Aluminum; Size: adjustable; this product is combined with foreign products plate developed new armpit crutches. High-quality high-strength aluminum alloy. Matte surface oxidation treatment process. Axillary selected high-end care, shaking hands, plastic seat. Push-button height adjustment marbles, ease, products sold at home and abroad, favored by the users. Features: 1, high-quality aluminum alloy surface treatment; 2, reinforced center tube to provide good support force; 3, specially designed telescopic tube to provide better security load; 4, avoid metal friction muffler sleeves reduce friction sound and echo, 5, non-slip rubber feet provide a good surface friction capability, built-in metal gaskets, strengthened its durability!