Springfield 9-Inch Round Plug-In Aluminum Base

Springfield's Plug-In Round Base measures 9 inches with an 8-inch hole pattern, built from high-strength aluminum with a satin finish for corrosion resistance.

It's a below-the-deck mount, requiring a 3-3/4-inch hole in the deck for installation, a straightforward job for anyone comfortable with a hole saw and basic hardware.

It's built to pair with any 2-3/8-inch Plug-In post, sold separately, completing a seat mounting foundation when combined with the right post. Check out the rest of our seats, pedestals and slides.

• 9" round base, 8" hole pattern
• High-strength aluminum, satin finish
• Requires a 3-3/4" hole in the deck
• Pairs with any 2-3/8" Plug-In post