SPRINGFIELD MAINSTAY 2 7/8″ HD 10″ – 12″ W/ TENSION KNOB

2-7/8" Heavy-Duty Adjustable Mainstay Package with Tension Knob – 9" Base

Package includes 2-7/8″ high-strength rigid 4-keyed anodized aluminum air-powered height adjustment pedestal (500 newton cylinder) with 9″ round anodized base, and locking Trac-Lock™ swivel & slide. 3-1/2″ outer post with 2-7/8″ inner post.