Specifications:
1) Features a unique grooved post design that provides security against rotation in the base and seat mount
2) Safely stabilized once the post is securely engaged in the base
3) Available in a Class AP power-rise pedestal
4) Flat side (D-shaped) bases available for mounting in tight quarters
5) Stainless steel hardware, high-strength aluminum, and engineering-grade plastics used throughout
6) Carries Springfield Marine's 3 year limited warranty
7) Height 13" to 17-1/4"
8) 9" base
9) U.S. Patent # 5,833,385