The KD four-wheel rollator walker is designed for walking assistance and daily mobility support. Based on the provided product information, the frame is made of aluminum alloy and incorporates nylon and Oxford fabric components. It features a 43 × 25 cm seat, a storage bag, four wheels and height-adjustable handles with seven adjustment positions from 77 to 92 cm. The standard front wheels are 8-inch EVA wheels and the rear wheels are 7-inch EVA wheels, with PU wheels available as an alternative. The walker supports a maximum load of 136 kg and can be folded for storage and transport.