Dependable Exam Stool is Built Tough. This classic stool has a chrome base and a solid steel machine screw height adjustment (not hollow pipe). A heavy-duty steel mounting plate attaches seat to base. The “Soft Feel" seat pairs high-density foam with a super-soft top layer for added comfort. Easy spin/thread adjustment. Seat is 14" (36cm) dia., 41/2" (11cm) thick. Treated with Perma Block 3 stain-resistant coating. With Rubber Casters, Square Foot Ring Rubber Tips (set).