Springfield King-Pin 4" x 8" Stainless Steel Threaded Rectangular Base, Satin Finish

Springfield King-Pin 4" x 8" Stainless Steel Threaded Rectangular Base, Satin Finish: ABYC: B Boat seat base: 4" x 8" Made to help secure your seat post to the floor to reduce or eliminate wobbling Uses 6 screws Helps to blend in with the flooring of your watercraft