The Rite-Temp® Deep Rough-In Kit for K-8305 Cartridges valve system sets new standards for ease of installation, application versatility and long-term reliability, simplifying your plumbing project and providing maximum flexibility for future changes or upgrades. Designed for installations where the valve has been roughed-in deeper than standard, this universal deep rough-in kit works with every Kohler Rite-Temp® trim.