28 Inch Complete Chair Swivel Hydraulic Base
This complete unit features everything pictured including casters, legs and swivel mechanism. This mechanism features hydraulic height adjustment. Heavy duty casters and quality materials ensure this swivel chair base will last for years.
Adjustable Height: 11 1/2"-14 1/2".Mechanism Top: 5 1/2" W x 17 1/2" L.Casters are metal with a hard plastic ball. 
