Ergomax Office ABC256GR, Adjustable Height Crank Desk Frame, 45 Inch Max Height, Grey (Tabletop Not Included) Not Applicable [CRANK ADJUSTABLE BASE]  height adjustable: 45" Max - 27" Min and width adjustable: 64" Max - 41" Min [MANUAL HAND CRANK]  For quick adjustments. The crank can be easily removed and stored. [MADE OF 100% STEEL] - Durable construction for long lasting comfort and joy. [RECOMMENDED BY DOCTORS] Ideal for office use to maximize productivity, increase stamina and energy through standing and reduce fatigue, discomfort, neck and back pain caused by static posture or prolonged sitting. [ONE YEAR, HASSLE FREE WARRANTY] - We strive for customer satisfaction. All ErgoMaxs products come with a one-year warranty. [SATISFACTION GUARANTEE]