This versatile C type tubing clamp is an inexpensive way to control flow in a variety of applications. Use it to control the flow in fountains when the pump is not easily accessible by the consumer. It works especially well in multi-outlet applications to balance flow between two outlets. Can also be used in pond applications where flow control to a filter needs adjusting. The center screw stem has an oversized knob that is easy to turn even with wet hands. Made of non-rusting stainless steel. Accepts tubing up to 5/8" in OD.