The Throne Toilet Spacers are specifically designed to raise toilet seats. The spacer is supplied with longer bolts to secure the seat and spacer to the pan.The Spacers come in two sizes, 50mm and 80mm. They can be used with or without Throne rails.The Throne spacers allow normal use of the toilet seat and they eliminate movement, which can lead to slipping off the pan.Spacers are easily installed, becoming an extension of the toilet pan.