A Commercial-Grade Heavy Duty Plastic is Perfect for those High Volume Areas and Resists Wear, Chips and Stains; Protect the Flush Valve or Toilet Tank with these Check Hinges that Prevent the Seat from Going 11 Degree Beyond Vertical; 300 Series Stainless Steel Posts and Pintles Resist Corrosion; Fits all Round Toilet Bowls Including Kohler, American Standard Toto, Glacer Bay, Aquasource, Delta; Made with Eco-Friendly Materials and Processes; Made in USA 14-1/2" x 16-5/16", White, Plastic, Non-Self-Sustaining Check/Self-Sustaining Check Hinge, Open Front, Round, Toilet Seat without Cover