Suggested Retail:$97. Autonomous ErgoStool - Height-Adjustable Active Sitting Office Chair & Ergonomic Standing Desk Swivel Stool- BLUE. 3.5 L x 13.5W x 24.5H (min) - 34H (max) inches. Build strength in your back and core by sitting up straight without the support of a chair and “wobbling” gently while you sit. Dynamic sitting emulates the frequent posture changes we make while standing which naturally tone our muscles. The weighted base provides great traction on various surfaces for a wide range of motion while seated. . 7 DAY FULL REFUND GUARANTEE ON THIS ITEM IF ANY ISSUE IS FOUND THAT WAS NOT DESCRIBED/PICTURED. PAID DELIVERY AND 7 DAY ALTERNATE PICK-UP ALSO AVAILABLE. SEE NOTES TO BIDDER, IN AUCTION DETAILS, AT THE TOP OF PAGE 1 FOR MORE INFO.