Kohler K-R1893-C-BN is a soap/lotion dispenser that can securely hold and dispense the liquid soap or lotion of your choice. The blunt end of the tube needs to be inserted into the bottom of the pump assembly, which is then positioned into the desired mounting hole. The nut is then threaded onto the pump assembly and securely hand tightened. Once the gasket is slid onto the pump assembly and the bottle opening is slid over the tube, the bottle should be threaded into the pump assembly until secure.