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These convenient mounting reinforcements save time and labor. They make it possible to install a backing for the seat base without needing access to the underside of the mounting surface.
The rings are installed via a 4" diameter hole is cut in the mounting surface. The backing plate/rings holes line up with the mounting holes in the seat base.
• Made of 3/16" x 1/2" 1018 plated steel
• Sold as a pair (seat base is not included)