The RUBBER THRESHOLD RAMP is designed for doorways & raised landings. Can be used by itself or two can be combined to make entry and/or exit convenient and safe. Sits against the doorsill (inside or outside) to provide a smooth ground to sill transition. Ideal for sliding glass doors because it does not interfere with the door track. Slip-resistant and designed for years of continued use. Its 2 1/2" height can easily be trimmed for lower heights and narrower widths to fit any entrance or threshold. Standard width is 48" (for wider entrances simply place 2 ramps side-by-side). Ideal for indoor and outdoor use and because the ramp is fully portable. Optional components are available to reach heights greater than 2 1/2" Made of 100% recycled tires.