SeaSense Poly Vinyl Keel Roller - Heavy Duty Boat Trailer Roller for Smooth Launching & Loading | Perfect for Marine, Fishing & Water Sports Enthusiasts

Like this product, no more black stains on the hull. Some reviews say they are too hard. They are hard, but not overly so. I would compare it to a new skateboard wheel. There is only a tiny bit of give at the surface. I put mine on about 5-6 months ago and am quite pleased. I believe they will last quite a while. They come with new rods and caps. Have fun getting the old caps off. Only ding is that the caps are not as rigid as I would expect. You have to tap them on and could easily damage them with an uneven strike. Have some channel locks handy to crimp if you damage the cap. The cap comes off, say bye to the assembly