The 4200 series two options for pneumatic lift stools: one backless and one with an adjustable backrest.
The 4240 model offers 15" round seat without back.
All 4200 Series Stools have five legs to distribute weight evenly and ensure stability. The circumference of the base exceeds that of the seat to maintain stability in the sit-stand position.
Both stools have 15" round seats
Stool height adjusts through lever located under the seat. To raise the stool, ease weight off and a pneumatic assist will raise the seat. Lift up the lever, and the stool gently descends to the desired height.