The Essential Medical Supply Elongated Elevated Toilet Riser gives the user the 3.5in elevation of a toilet riser but still allows them to use their own seat. The seat can be installed securely under your existing toilet seat using the included long screws and bolts. Molded plastic seat riser is designed for longe term use and handles are adjustable to ensure the perfect git. The toilet rier is available in a standard size so please check the size of your toilet bowl before purchasing. Elongated Seat Depth: 19.5", Riser Height: 3.5" Tools required for installation.