2 Pack 4'' Rise Heavy Rubber Curb Ramp Heavy Duty Loading Rubber Curb Ramps 3 Tons Driveway Ramp Car Slope Ramp for Loading Dock Bike Vehicle Warehouse Sidewalk Wheelchair: Our rubber curb ramps are perfect for loading docks, driveways, garages, and sidewalks. They are made of heavy-duty rubber and have a 4'' rise, making them suitable for vehicles up to 3 tons. The ramps are non- slip and have a textured surface for added traction.