The Rohl A4911BO is a rough valve for a 3/4" volume control wall valve. It is from the Country Bath collection. This rough valve has a 3/4"F inlet and outlet. It is an on/off valve for the following trim set: the A4912, the A2912, the A4712, the A4812, and the A4012. Rohl's rough valve has a brass valve housing with a 1/4-turn ceramic disc control cartridge. Must order the following trim set to complete the package: the A4912, the A2912, the A4712, the A4812, and the A4012. Please see the specification sheet for more details. The Rohl A4911BO rough valve is covered by a limited lifetime warranty. It is a representation of Rohl's commitment to making products that are easy for the customers to install and use. The House of Rohl has been in the business since 1983. They have reached success by providing distinctively different faucets and fixtures that define real luxury. To create superior products that will enhance your way of living is Rohl's goal. Here at PlumbersStock, we guarantee that you have access to the highest quality products and resources at very affordable prices. We pride ourselves in striving for excellence in every aspect of what we do.