Using your Living Earth Crafts pneumatic rolling stool is easy. To adjust the height, simply use the pneumatic - lift lever to raise or lower the seat to your desired level. Roll around your workspace with ease using the 5 - leg caster base. When sitting, enjoy the comfortable 3 - inch padded seat. Make sure not to exceed the 350 - lb weight limit to keep the stool in good condition. For maintenance, regularly clean the seat and the caster wheels with a soft, damp cloth. If the stool seems wobbly, check the legs and tighten any loose screws. If you've chosen the optional backrest, ensure it's securely attached.