Review on Nicedec 2 Pack Stainless Stoppers Non Slip by Ginny Gregory

I received these to stabilize my Dutch dog cart which was adopted by my cat and is currently living indoors on wooden floors. I use 2 stoppers per wheel for a total of 3. They aren't very big but it works for my purposes which are mainly used as chocks for bike tires which are dog bikes and a smaller front wheel. This was by far the most economical solution to the cart's skid problem when a 10+ pound cat jumped in. They don't have an odd smoky odor and are very inert to the floor, ie don't stick and don't want to stain the floor. If you have a door that is very high off the ground they might not work, although you could probably use more than one. But if you're using multiple corks, it's a good deal.