The KM5000 series, made with Aircraft grade aluminum is the primary frame material which boasts a limited lifetime warranty, and 1 year on parts. The KM5000 series features reclining backrest, detachable armrests, elevating legrests, brake handles, and handrims. The KM5000 series specifically feature height adjustable footrest, breathable upholstery, attendant brakes, and a super compact folding frame for ease of travelling.