Problem Solving Bushings (PSB) is a brand of polyurethane bushings, backed by our lifetime warranty. Polyurethane bushings are stronger and last longer than standard rubber bushings Design - The sleeves in our bushings freely rotate which enhances longevity. Installation - Once removal of original bushings has taken place, installation of the new polyurethane bush typically takes from 1 - 5 minutes to install, the techs love it! As a brand, we are actively involved in development to meet our customer's needs