Springfield 1660231 3-Stage Clear Anodized Pedestal Set (Includes Square Table Mount and Base), 14, 20, 28

12-1/2" square table mount. 12" diameter base with 11" hole pattern for added stability. Nylon clamping bushings with stainless steel hardware. Air-Powered height adjustment, simply release to raise or push down and lock in place. No pumps or power require