Book smarts, as applied to the bathroom. These TRIMendous™ interchangeable bath/shower trim kits from our traditional Princeton® Collection all fit universal valves so you can update your bath/shower trim in minutes without having to replace the valve (sold separately).Experience total flexibility in bathroom design with TRIMendous™ valves and trims. TRIMendous decorative valve trims are all engineered to fit a universal valve making them easily interchangeable. Updating a bathroom shower is now