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Rock & Swivel adjustable height 27" chair base

Style # SKU M9403G

Tipping over resistant 27” wide heavy stable metal chair base.
Chrome Gas cylinder raises or lowers chair seat virtually3”.
7” X 7" strong 360° swivel seat plate that has chair attaching slotted holes 5 1/2" apart.
Choose instead an office Rock & Swivel mechanism with 6"X10" attaching slotted chair holes during check out.

Rubber floor glides on each leg prevent flooring damage.


Square plate version: Floor to top of square plate with casters, base, gas cylinder and square plate-Low is 11 1/2", high is 14".
Mounting holes are slotted making installation easier and are 5 1/2" apart.

Rock and Swivel 3318G version: Floor to top of mechanism with casters, base, gas cylinder, and swivel tilt mechanism-Low is 12 1/4", high-14 3/4".
Mounting holes are slotted making installation easier and are 6" wide X 10" front to back apart.

Higher heights are available.

Insert without tools the Chrome gas cylinder into the center hole of the 4 leg chair base. Just sitting in the chair more than once will make it extremely tight and difficult to remove without tools.

A mounting board may be necessary to install SKU 3318 or any other size mechanism.