VEVOR Upgraded Rubber Threshold Ramp, 8.9 cm Rise Door Ramp with 1 Channel, Natural Rubber Car Ramp with Non-Slip Textured Surface, 15 tons Load Capacity Curb Ramp for Wheelchair and ScooterProduct Features Smooth Transition & 1 Channel Design Our 3. 5" rise ramp with channel design creates a smooth transition over any door, entryway, or uneven threshold surface. The reserved channel underneath allows cables to pass through without getting crushed or damaged by wheelchairs or scooter wheels. 3. 5" Rise Beveled Edges Size: 35. 5" L x 21" W x 3. 5" H 90. 2 x 53. 34 x 8. 9 cm. Fit for maximizing 27. 6" 70 cm width wheelchair to pass. The