With a traditional style that complements classic bathroom decor, this Glenbury seat fits most elongated toilets. Made of durable, stain-resistant plastic, the ergonomically contoured seat includes Grip-Tight bumpers that keep the seat from shifting. This soft-close seat features innovative technology that prevents slamming and simplifies both cleaning and installation. Kohler® Toilet Seat, Glenbury™ Q3™, Elongated Bowl, Quick Release Hinge, Closed Front, 5-1/2 in Mounting Hole, 14-3/16 in Width, 1-5/16 in Height, 18-1/16 in Length, 1-5/16 in Thickness, Plastic, Thunder™ Gray