If used outdoors, there is no need to worry about the odor. 30 tons weighs as much as a Sherman tank. Because it is made of strong enough rubber.
Curb Ramps for Sidewalks 2" Rise Rubber Curb Ramps Threshold Ramp for Driveway S
2'' Rise Rubber Curb Ramp Heavy Duty Rubber Threshold Ramp for Car Loading Dock
2 Pcs 2" Rise Rubber Curb Ramp Threshold Ramps,2" H 38.5" L 9.5" W.Heavy Load
2 Rise Rubber Curb Ramp Heavy Duty Threshold Ramp Kit Set 10Ton Drive
Heavy Duty 2" Rise Rubber Curb Ramp for Cars, Trucks & Bikes - 10 Ton Capacity
1.6/3.2'' Rise Rubber Curb Ramp, Heavy Duty, 15000 LBS Capacity, Threshold Ramps, Car Slope Ramp for Loading Dock Vehicle Warehouse Sidewalk(50x32x11cm/19.7x12.6x4.3in)