Pretty much every Daystar product I've had has never let me down and is usually made out of polyurethane material. However, these cradles are made of harder plastic. I don't really care about the material, but functionality and reliability are the two most important factors. So far these cradles have met my expectations. My biggest complaint is that I had to drill and tap the fender mount on my axle to install it. My Air Lift 5000 kit didn't allow the use of bottom brackets with brackets, so my Power Wagon required a direct axle mount. So far, so good. I needed a set of airbags to handle the increased load on our new trailer. It's another story, but I haven't had a chance to tow yet due to ongoing supply issues in the RV industry.