The Rohl R942693 is a 3/4-inch cartridge - hot side from the Michael Berman collection. It has a counterclockwise opening. This Rohl volume control cartridge is the standard cartridge for the MB1942 wall-mounted volume control. The lever and dome are assembled separately. 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.