The Medline Raised Toilet Seat Riser can easily be installed on top of your toilet bowl. The advantage of this device is that it provides the additional height of 4.25", decreasing the distance you have to sit down or stand up. The Medline toilet seat riser is constructed of sturdy white polyethylene and provides excellent support for individuals up to 300 lbs. No installation is necessary as it sits on top of your existing toilet bowl. The heavy-duty toilet seat riser does not fit oblong or elongated toilets and should not be used in conjunction with them. Easy to maintain, the surface can be wiped clean and sanitized between uses as required. Good for a home setting, the insert will provide individuals with mobility limitations more freedom in performing their daily self-care. Contoured for comfort, the unit will not create undo pressure points when it is used. The Medline Raised Toilet Seat Riser requires no special stools to install and can be used right after it is put into place.