cylinder is acting up and sometimes will deflate. Replacement cylinder is 100 dollars or so. Purchased chair for 600.00. Solid Wood Constructed of hardwood solid Gas lift height adjustment handle Adjustable seat height from floor: 19 1/2" - 23 1/2" Swivel and five-prong tilt base with rocker tension adjustment knob Equipped with casters - Chair is in near new condition. Text or email me Thanks