Silhouet-Tone Round Air-Lift StoolRound Air Lift Stool Round air lift stool with black base, 5 silent soft wheel casters, and adjustable height. N. B. Available in pure white, custom colors lead to 4 to 6 weeks of additional production. Rest easy in this round air lift stool from Silhouet Tone. Five whisper quiet rolling casters on a large stable base make this stool a simple addition to your treatment room with easy access to supplies and a generous 3'' padding for maximized comfort