The 20"H backless design encourages proper posture, promoting blood flow for increased classroom performance and overall health. Heavy-duty base is made of powder-coated 1" dia steel tubing that is welded together for long-lasting dependability. Four 2-1/2" dia inline casters roll smoothly and quietly across classroom floors, even on carpet!
Set includes a base and a 45 cm burst-resistant stability ball. Base is 19-1/2"L x 19-1/2"W x 9-1/2"H (20"H with ball); 11 lb.