The Springfield 2-7/8" Heavy-Duty Adjustable Mainstay Package combines a high-strength air-powered pedestal with a locking swivel and slide for a complete, ready-to-install boat seat base solution. The rigid anodized aluminum construction and 500-newton cylinder deliver smooth, reliable height adjustment across a full day on the water.

Specifications:

• Pedestal diameter: 3-1/2" outer post with 2-7/8" inner post
• Construction: 4-keyed anodized aluminum, high-strength rigid design
• Height adjustment: air-powered with 500-newton cylinder
• Base: 9" round anodized aluminum
• Swivel and slide: locking Trac-Lock™ included
• Package includes pedestal, base, and locking Trac-Lock™ swivel and slide