The Rohl ZA33BO is a 3/4-inch rough only wall volume control. It is from the Rohl Modern and the Cisal Italian Bath collection. This volume control has a 1/4-turn ceramic disc control. It has a 3/4" inlet and outlet. It comes with a trim adaptor. Rohl's 3/4-inch rough only wall volume control has a minimum installation depth of 5/16" from the front of the valve and a maximum installation depth of 1 3/16" from the front of the valve. It is not suitable for deck installations. For a complete set, you must order the following trim sets: the AC31, the BA31, the WA30, or the WA31. The Rohl ZA33BO volume control is covered under 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.