Features: The rubber composition of the ramp not only minimizes noise during movement but also absorbs shock. This feature ensures quieter operation and provides a smoother transition over thresholds for all kinds of wheeled devices. The rubber construction and anti slip features mean that over time, this ramp retains functionality with minimal maintenance, making it a practical addition to various environments where long-term stability is paramount. Specifications: Material: rubber Color: black Size: About 31.5 x 15.75 x 3.15 Inches Slot size: about 4.7 x 2.4 inches Package includes: 1 x Rubber ramps for door threshold 2 x Mounting screws Notes: Manual measurement, please allow slight errors on size. The color may exist a slight difference due to different screen displays Small parts included, please keep them away from little kids to avoid swallowing risk