-Adjustable height-Portable bottom wheel - There are wheels on the bottom part which makes it more portable to move. The wheels could let you change its position wherever you want-Weather prevention material - This item would not easy to rust or weathered. Even you put outdoor it also could sustain long time usage in sunny or rainy days-Solid structure - Structured with heavy-duty material for extended durability and the structure follows the scientific principle and is strong enough to hold var