Stanley Proto JFC1011 Proto Heavy-Duty Shop Stool 300 lbs. seating capacity 29-inch to 34-inch pneumatic gas lift seat height adjustment Comfortable 14-inch diameter x 3-1/2-inch thick vinyl fabric over foam seat Contoured 12-inch x 6-inch x 2-1/2-inch thick vinyl over foam back Durable steel constructed seat control with dual 1-inch tubular steel back bars