This ramp is made of high quality Japanese natural synthetic rubber produced in a proprietary formula, and is designed for 3.9 inches (10 cm) increments. Compared to conventional recycled rubber models, it is softer and more resistant to slipping, and it absorbs impact when riding up, greatly reduces vehicle rattling noise compared to steel and plastic. The rubber quality has been significantly improved compared to conventional recycled rubber.
Even if the ramp is the same size, the shrinkage rate after the rubber molding is different, so there may be slight differences in the measurements. Thank you for your understanding. If used for some extent, white powder of anti-aging agents will appear on the surface of the slope, but this is not a problem with the quality