No More Callbacks for Loose Seats, the Sta-Tite® Commercial Fastening System™ Reduces Installation Time and Eliminates Callbacks for Loose Seats; 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; Fits Most Manufacturers Elongated Toilets Including Kohler, American Standard, Toto, Glacier Bay, Aquasource, Delta and Many More; Made with Eco-Friendly Materials and Processes; Made in USA 14-1/2" x 18-9/16", Non-Self-Sustaining Check Plastic Hinge, Bone, Plastic, Open Front, Elongated, Heavy Duty, Toilet Seat without Cover