W&H Coupling RM-34 LED Optic for MULTIflex is a 6-hole coupling for transmitting air, water, electricity and light between the dental unit supply hose and compatible air-driven instruments. It is suitable for turbines, air motors and scalers with a MULTIflex connection and can replace a conventional halogen coupling without changes to an optic dental unit. Features include a long-life LED, continuous spray water regulation and a non-retraction valve.