Round seating measures 15.7 inches across and 3.9 inches deep in this stool, a broad flat cushion that suits work where the operator shifts position often rather than staying locked in one posture. High-density compressed foam under a waterproof breathable Pu cover holds its loft through long shifts and wipes down between clients in a clinic, salon, spa or tattoo studio. The backrest follows the curve of the spine to pick up the lumbar region and discourage slouching during detailed close work. An Sgs-certified three-stage hydraulic cylinder sets seat height anywhere from 33.1 to 39.4 inches, matching bench, couch or counter heights in a professional room. A 21.3 inch iron base spreads the 450 pound rating across five points and rolls on smooth casters, with 360 degree rotation for reaching a trolley or a client without rising. Assembled weight is 15.8 pounds.