Review on Maxsa 37353 Park Right Tire Saver Ramps: Effective Flat Spot Prevention & Vehicle Storage (Set of 4), Black by Harley Franchetti

Worked great. By adding something like these non-slip liners under the ramps, I was able to climb the ramp without any issues or slipping. (I decided to save myself the heartache based on other reviews.) The weight of the box is about 23 pounds, so they're pretty heavy. It's probably fine for use, unsurprisingly for storage, but they seem to be very durable.