Dog wheelchair made of aircraft-grade aluminum, lightweight with shock absorption, and EVA wheels. I purchased this for a 18-year-old, 2.7kg miniature dachshund, but the size didn't fit, so it hasn't been used. It has only been opened, assembled, and size-adjusted; it is unused. I am selling it because my beloved dog has passed away. - Material: Aircraft-grade aluminum - Wheels: EVA material wheels - Features: Shock absorption - Hardware: Stainless steel - Type: 4-wheel support Thank you for looking.