This baby walker is made of environmentally friendly PP plastic, and the frame is thickened aluminum tube, which has good load-bearing ability. At the same time, the stable four-corner support structure and the large chassis design make the center of gravity more stable, which can prevent rollover problems. So it's great for babies who are ready to explore walking. [9 gear height adjustment]: Our baby walkers for boys and girls have 9 gear adjustment modes, including 5 gear adjustment for the body and 4 gear adjustment for the seat. Adjustable body height: 15.75 inch to 18.5inch. Adjustable seat cushions can provide your baby with extra support and a comfortable tilt. You are free to adjust the appropriate height according to your baby's height to prevent O-legs. [Foldable storage]: Baby walkers have foldable support arms that can be easily folded without any tools. And no installation is required to use. At the same time, baby walker portable is small and easy to carry and store. Expansion Size: 25.2"（L）*18.11"（W) *"15.75-18.5"(H) for toddlers 7 to 18 months of age. Folded Size: 25.2"（L）*3.94"(H). Please confirm the baby's height before purchase. It can support a 30-pound baby. [Wear-resistant silent wheel]: With 6 x 2 large universal wheels, intelligent multi-direction, so that the baby can move freely 360°. At the same time, PU soft tread, more wear resistant than ordinary wheels. Therefore, our baby walkers with wheels can be noiseless, does not damage the floor, does not